Surface-treatment agent for powder for use in cosmetic and cosmetic containing powder treated with the same

ABSTRACT

The present invention relates to a surface-treatment agent for powders for use in cosmetics, including a specific polymer having a specified carbosiloxane dendrimer structure, as well as a cosmetic comprising a powder which has been treated with the above surface-treatment agent. The surface-treated powder does not generate hydrogen, and therefore is safe. Further the surface-treated powder can exhibits, good compatibility with other cosmetic raw materials, and thereby, the stability of the formulation in cosmetics can be improved. The surface-treated powder can provide cosmetics with good water resistance, good sebum resistance, good glossiness, a good tactile sensation, good adhesive properties to hair and/or skin, or the like. The cosmetic can also have superior surface protective properties, a superior outer appearance, and/or a superior sensation during use.

TECHNICAL FIELD

The present invention relates to a cosmetic, and in particular, relates to a novel surface-treatment agent for powders for use in cosmetics, which contains a polymer having a carbosiloxane dendrimer structure with a specified structure, as well as a cosmetic containing powders which are subjected to a surface treatment with the aforementioned surface-treatment agent for powders for use in a cosmetic.

This application claims priority to and all the advantages of International Patent Application No. PCT/JP2010/073862, filed on Dec. 22, 2010, which claims priority to Japanese Patent Application No. JP 2009-293391, filed on Dec. 24, 2009.

BACKGROUND ART

Recently, as various types of surface-treatment agents for use in cosmetics, methylhydrogenpolysiloxanes have been widely used. Powders treated with methylhydrogenpolysiloxanes exhibit increased water repellency, and for this reason, characteristics of improving make-up durability are exhibited. However, since the methylhydrogenpolysiloxanes induce not only a reaction with the surface of powder, but also an intermolecularly-cross linking reaction during surface-treating, the rate of reaction is reduced. As a result, unreacted Si—H bonds remain on the surface-treated powders. Therefore, hydrogen may generate as a gas depending on the conditions, and this is dangerous in the presence of fire or the like. In addition, there are various problems of causing expansion of a cosmetic container, fogging of compact mirror and the like.

In order to solve the aforementioned problems, Japanese Unexamined Patent Application, First Publication No. H05-237360 proposes a method in which surface-treated powders are treated at high temperature so that Si—H bonds do not remain as much as possible. However, the aforementioned method cannot be applied to heat-sensitive powders such as yellow iron oxide, Red No. 202 and the like, and further improvements are needed.

Under the circumstances described above, as a method in which residual Si—H bonds are not produced, Japanese Unexamined Patent Application, First Publication No. H07-196946 proposes a surface-treatment method using a one-terminal alkoxy-modified silicone, and WO 2002/100356 proposes a surface-treatment method using an acryl-modified silicone having an alkoxysilyl group. However, in the case of using the one-terminal alkoxy-modified silicone, the amount of the alkoxy group is reduced, and for this reason, there is a problem in that low reactivity with the powders is exhibited. On the other hand, in the surface-treatment method using an acryl-modified silicone having an alkoxysilyl group, the acryl-modified silicone having a linear silicone is grafted on an acryl main chain, and for this reason, there is a problem in that sebum resistance and the like are not sufficient. In addition, powders surface-treated with the acryl-modified silicone having an alkoxysilyl group exhibit low compatibility with other raw materials for cosmetics, and there is a problem in view of stability in blending in cosmetics.

On the other hand, in order to ameliorate the problems caused by the linear silicones, a cosmetic raw material comprising a vinyl-based polymer having a carbosiloxane dendrimer structure at the side chain or a vinyl-based polymer having both a carbosiloxane dendrimer structure and a fluorinated organic group, as a main agent is proposed (see Japanese Unexamined Patent Application, First Publication No. 2000-63225; and Japanese Unexamined Patent Application, First Publication No. 2003-226611). However, Japanese Unexamined Patent Application, First Publication No. 2000-63225 and Japanese Unexamined Patent Application, First Publication No. 2003-226611 fail to describe application of various types of powders to surface treatments.

DISCLOSURE OF INVENTION Technical Problems

The present invention has been made in view of the circumstances of the aforementioned prior art. The objective of the present invention is to provide a surface-treatment agent for powders for use in cosmetics which is safe without generating hydrogen, exhibits good compatibility with other cosmetic raw materials, and therefore, can improve the stability of the formulation in cosmetics, as well as which can provide good water resistance, sebum resistance, glossiness, tactile sensation, and/or adhesive properties to hair and/or skin to the cosmetics, and the like; as well as provide a cosmetic formed by blending cosmetic powders surface-treated with the aforementioned surface-treatment agent, which exhibits superior surface-protective properties, a superior outer appearance and/or a superior sensation during use.

Technical Solution

The objective of the present invention can be achieved by a surface-treatment agent of powders for use in cosmetics comprising a polymer having a carbosiloxane dendrimer structure presented by the following formula (1):

wherein Z is a divalent organic group; p is 0 or 1; each of R¹ and R² independently represents an alkyl group, an aryl group or an aralkyl group, having 1 to 10 carbon atoms; and L¹ is a silylalkyl group, in the case of i=1, represented by the following formula (2):

wherein Z and p are the same as defined above; R¹ and R² are the same as defined above; i is an integer ranging from 1 to 10, which specifies the total number of generations of the aforementioned silylalkyl group; L^(i+1) is a group selected from the group consisting of a hydrogen atom, alkyl, aryl and aralkyl groups, having 1 to 10 carbon atoms and the aforementioned silylalkyl group, with the proviso that in the case of i=c, in which c is an integer ranging from 1 to 10 and specifies generation of the aforementioned silylalkyl group, L^(i+1) is a hydrogen atom, or an alkyl, aryl or aralkyl group, having 1 to 10 carbon atoms; and in the case of i<c, L^(i+1) is the aforementioned silylalkyl group; and a^(i) is an integer ranging from 0 to 3.

The aforementioned polymer is preferably a copolymer of at least,

(A) an unsaturated monomer having a carbosiloxane dendrimer structure presented by the following formula (1):

wherein Z is a divalent organic group; p is 0 or 1; each of R¹ and R² independently represents an alkyl group, an aryl group or an aralkyl group, having 1 to 10 carbon atoms; and L¹ is a silylalkyl group, in the case of i=1, represented by the following formula (2):

wherein Z and p are the same as defined above; R¹ and R² are the same as defined above; i is an integer ranging from 1 to 10, which specifies the total number of generations of the aforementioned silylalkyl group; L^(i+1) is a group selected from the group consisting of a hydrogen atom, alkyl, aryl and aralkyl groups, having 1 to 10 carbon atoms and the aforementioned silylalkyl group, with the proviso that in the case of i=c, in which c is an integer ranging from 1 to 10 and specifies generation of the aforementioned silylalkyl group, L^(i+1) is a hydrogen atom, or an alkyl, aryl or aralkyl group, having 1 to 10 carbon atoms; and in the case of i<c, L^(i+1) is the aforementioned silylalkyl group; and a^(i) is an integer ranging from 0 to 3, and (B) an unsaturated monomer having at least one silicon-bonding alkoxy group.

The aforementioned unsaturated monomer having the carbosiloxane dendrimer structure (A) preferably has a group selected from the group consisting of an acryl or methacryl group-containing organic group represented by the following general formula:

wherein R⁴ is a hydrogen atom or a methyl group; and R⁵ is an alkylene group having 1 to 10 carbon atoms, or

wherein R⁴ and R⁵ are the same as defined above, an alkenylaryl group-containing organic group represented by the following general formula:

wherein R⁶ is a hydrogen atom or a methyl group; R⁷ is an alkyl group having 1 to 10 carbon atoms; R⁸ is an alkylene group having 1 to 10 carbon atoms; b is an integer ranging from 0 to 4; and c is 0 or 1, and an alkenyl group having 2 to 10 carbon atoms.

The aforementioned polymer may be a product obtained by copolymerizing the aforementioned monomers further with (C) at least one unsaturated monomer having no silicon-bonding alkoxy group. The aforementioned other unsaturated monomer preferably has a C₁₋₆ lower alkyl group.

In addition, the objective of the present invention can be finally achieved by powders surface-treated with the aforementioned surface-treatment agent for powders for use in a cosmetic, as well as a cosmetic containing the aforementioned powders.

The cosmetic of the present invention can further comprise an oil agent or agents.

The aforementioned oil agent can be a silicone oil, and the aforementioned silicone oil can be a hydrophobic silicone oil having a viscosity ranging from 0.65 to 100,000 mm²/s at 25° C.

In addition, the aforementioned silicone oil can be an organopolysiloxane represented by the following general formula (3), (4) or (5):

wherein R⁹ is a hydrogen atom, a hydroxyl group or a group selected from monovalent non-substituted or fluorine- or amino-substituted C₁₋₃₀ alkyl groups, aryl groups, alkoxy groups and groups represented by (CH₃)₃SiO{(CH₃)₂SiO}₁Si(CH₃)₂CH₂CH₂—, wherein 1 is an integer ranging from 0 to 1,000; a′ is an integer ranging from 0 to 3; b′ is an integer ranging from 0 to 1,000; and c′ is an integer ranging from 0 to 1,000, with the proviso that 1≦b′+c′≦2,000,

wherein R⁹ is the same as defined above; d is an integer ranging from 0 to 8; and e is an integer ranging from 0 to 8, with the proviso that 3≦d+e≦8, R⁹ _((4-f))Si(OSiCH₃)_(g)  (5) wherein R⁹ is the same as defined above; f is an integer ranging from 1 to 4; and g is an integer ranging from 0 to 500.

The cosmetic of the present invention can further comprise at least one surfactant selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants and semi-polar surfactants.

The cosmetic of the present invention can further comprise at least one powder and/or at least one coloring agent. The aforementioned powder can be selected from the group consisting of inorganic pigment powders, organic pigment powders and resin powders, having an average particle size ranging from 1 nm to 20 μm. At least one part of the aforementioned powder and/or the aforementioned coloring agents may be subjected to a water-repellent treatment by means of a surface-treatment agent other than the surface-treatment agent for powders for use in a cosmetic of the present invention.

The cosmetic of the present invention can further comprise at least one selected from the group consisting of water-soluble polymers, oil-soluble gelling agents and organo-modified clay minerals.

The cosmetic of the present invention can further comprise at least one selected from the group consisting of silicone resins, silicone elastomers and organo-modified silicones.

The cosmetic of the present invention can further comprise at least one UV-ray protective component.

The present invention also relates to a skin care product, a hair product, an antiperspirant product, a deodorant product, a makeup product or a UV-ray protective product, containing the aforementioned cosmetic.

Advantageous Effects of the Invention

The surface-treatment agent for powders for use in cosmetics of the present invention can be suitably used in order to provide water repellency to powders for use in cosmetics, and the surface-treatment agent is safe since hydrogen does not generate. In addition, the surface-treatment agent for powders for use in cosmetics of the present invention uses a polymer in which a silicone which is not a linear one, but a highly-branched dendrimer one is grafted on the main chain. For this reason, the surface-treatment agent exhibits good compatibility with various other cosmetic raw materials, and therefore, superior stability in blending in a cosmetic can be exhibited. In particular, in the case of using a copolymer obtained by using the aforementioned unsaturated monomer having at least one silicon-bonding alkoxy group (B), superior water repellency, safety and formulation stability can be particularly obtained. In addition, powders surface-treated with the surface-treatment agent of powders for use in cosmetics of the present invention can provide good water resistance, sebum resistance, glossiness, tactile sensation, adhesive properties to hair and/or skin or the like to cosmetics.

The cosmetic of the present invention comprises the aforementioned cosmetic powders surface-treated with the aforementioned surface-treatment agent. For this reason, superior surface protective properties in view of water resistance, sebum resistance, glossiness, tactile sensation, and/or adhesive properties with respect to the hair and skin, as well as superior outer appearance and/or a superior sensation during use can be provided.

BRIEF DESCRIPTION OF DRAWINGS

FIGURE Graph showing results of rheology measurement in Evaluation 2.

BEST MODES FOR CARRYING OUT THE INVENTION

The surface-treatment agent for powders for use in a cosmetic of the present invention comprises a polymer having a carbosiloxane dendrimer structure represented by the following formula (1):

wherein Z is a divalent organic group; p is 0 or 1; each of R¹ and R² independently represents an alkyl, aryl or aralkyl group, having 1 to 10 carbon atoms; and L¹ is a silylalkyl group, in the case of i=1, represented by the following formula (2):

wherein Z and p are the same as defined above; R¹ and R² are the same as defined above; i is an integer ranging from 1 to 10, preferable ranging from 1 to 5, more preferably ranging from 1 to 3 and is further preferably 1 or 2, which specifies the total number of generations of the aforementioned silylalkyl group; L^(i+1) is a group selected from the group consisting of a hydrogen atom, alkyl, aryl and aralkyl groups, having 1 to 10 carbon atoms and the aforementioned silylalkyl group, with the proviso that in the case of i=c in which c is an integer ranging from 1 to 10, preferably ranging from 1 to 5, more preferably ranging from 1 to 3 and being further preferably 1 or 2, and specifying generation of the aforementioned silylalkyl group, L^(i+1) is a hydrogen atom, an alkyl, aryl or aralkyl group, having 1 to 10 carbon atoms; and in the case of i<c, L^(i+1) is the aforementioned silylalkyl group; and a^(i) is an integer ranging from 0 to 3, preferably ranging from 0 to 2, more preferably ranging from 0 to 1 and being further preferably 0. The aforementioned polymer preferably has a vinyl polymerization unit as a main chain, and has a carbosiloxane dendrimer structure present at a side chain or side chains.

The aforementioned polymer of the present invention is preferably a copolymer of at least,

(A) an unsaturated monomer having a carbosiloxane dendrimer structure represented by the following formula (1):

wherein Z is a divalent organic group; p is 0 or 1; each of R¹ and R² independently represents an alkyl, aryl or aralkyl group, having 1 to 10 carbon atoms; and L¹ is a silylalkyl group, in the case of i=1, represented by the following formula (2):

wherein Z and p are the same as defined above; R¹ and R² are the same as defined above; i is an integer ranging from 1 to 10, preferably ranging from 1 to 5, more preferably ranging from 1 to 3 and is further preferably 1 or 2, which specifies the total number of generations of the aforementioned silylalkyl group; L^(i+1) is a group selected from the group consisting of a hydrogen atom, alkyl, aryl and aralkyl groups, having 1 to 10 carbon atoms and the aforementioned silylalkyl group, with the proviso that in the case of i=c in which c is an integer ranging from 1 to 10, preferable ranging from 1 to 5, more preferably ranging from 1 to 3 and being further preferably 1 or 2, and specifying generation of the aforementioned silylalkyl group, L^(i+1) is a hydrogen atom, an alkyl, aryl or aralkyl group, having 1 to 10 carbon atoms; and in the case of i<c, L^(i+1) is the aforementioned silylalkyl group; and a^(i) is an integer ranging from 0 to 3, preferably ranging from 0 to 2, more preferably ranging from 0 to 1 and being further preferably 0, and (B) an unsaturated monomer having at least one silicon-bonding alkoxy group.

The ratio of the aforementioned unsaturated monomer having a carbosiloxane dendrimer structure (A) and the unsaturated monomer having at least one silicon-bonding alkoxy group (B) is not particularly restricted. The ratio of (weight of component (A))/(weight of all the monomers) preferably ranges from 0.02 to 0.7, more preferably ranges from 0.1 to 0.6 and further preferably ranges from 0.2 to 0.5. The ratio of (weight of component (B))/(weight of all the monomers) is preferably 0 or more, but less than 0.5, preferably ranges from 0.05 to 0.4 and more preferably ranges from 0.1 to 0.3.

The divalent organic group is not particularly restricted, and examples thereof include, for example, a substituted or non-substituted, and linear or branched divalent hydrocarbon group having 1 to 30 carbon atoms. As examples of the substituted or non-substituted, and linear or branched divalent hydrocarbon group having 1 to 30 carbon atoms, mention may be made of, for example, linear or branched alkylene groups having 1 to 30 carbon atoms such as a methylene group, a dimethylene group, a trimethylene group, a tetramethylene group, a pentamethylene group, a hexamethylene group, a heptamethylene group, an octamethylene group and the like; alkenylene groups having 2 to 30 carbon atoms such as a vinylene group, an allylene group, a butenylene group, a hexenylene group, an octenylene group and the like; arylene groups having 6 to 30 carbon atoms such as a phenylene group, a diphenylene group and the like; alkylenearylene groups having 7 to 30 carbon atoms such as a dimethylenephenylene group and the like; and substituted groups thereof in which hydrogen atoms bonded to carbon atoms of the aforementioned groups are at least partially substituted by a halogen atom such as a fluorine atom or the like, or an organic group containing a carbinol group, an epoxy group, a glycidyl group, an acyl group, a carboxyl group, an amino group, a methacryl group, a mercapto group, an amide group, an oxyalkylene group or the like. The divalent hydrocarbon group is preferably a non-substituted divalent saturated hydrocarbon group having 1 to 30 carbon atoms, more preferably a linear or branched alkylene group having 1 to 6 carbon atoms, and in particular, preferably a dimethylene group.

For example, the divalent organic group may be a group selected from the following groups: —R³— —R³—CO— —R³—COO—R³— —CO—R³— —R³—COO—R^(3′)— —R³—CONH—R^(3′)— —R³—R^(3′)— wherein R³ is the aforementioned substituted or non-substituted, and linear or branched divalent hydrocarbon group having 1 to 30 carbon atoms, which may have a substituent as described above; and R^(3′) is a group selected from the following groups:

A divalent organic group represented by the following general formula: —R³— or —R³—R^(3′)— which is derivable by means of a reaction between a hydrogen atom bonded to a silicon atom and an alkenyl group is preferred.

In the same manner as described above, a divalent organic group represented by the following general formula: —R³—COO—R³— or —R³—COO—R^(3′)— which is derivable by means of a reaction between a hydrogen atom bonded to a silicon atom and an unsaturated carboxylic acid functional group is also preferred.

In particular, the aforementioned Z is preferably a linear or branched alkylene group having 1 to 30 carbon atoms, and particularly preferably a dimethylene group (ethylene group).

As examples of alkyl groups, aryl groups, or aralkyl groups, having 1 to 10 carbon atoms, mention may be made of, for example, linear or branched alkyl groups having 1 to 10 carbon atoms such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group and the like; cycloalkyl groups having 3 to 10 carbon atoms such as a cylopentyl group, a cyclohexyl group and the like; aryl groups having 6 to 10 carbon atoms such as a phenyl group, a tolyl group, a xylyl group and the like; aralkyl groups having 7 to 10 carbon atoms such as a benzyl group and the like; and substituted groups thereof in which hydrogen atoms bonded to carbon atoms of the aforementioned groups are at least partially substituted by a halogen atom such as a fluorine atom or the like, or an organic group containing a carbinol group, an epoxy group, a glycidyl group, an acyl group, a carboxyl group, an amino group, a methacryl group, a mercapto group, an amide group, an oxyalkylene group or the like. The alkyl group, aryl group or aralkyl group is preferably an unsubstituted alkyl, aryl or aralkyl group, having 1 to 10 carbon atoms, more preferably an unsubstituted alkyl or aryl group having 1 to 6 carbon atoms, and in particular, preferably a methyl group, an ethyl group or a phenyl group.

The aforementioned carbosiloxane dendrimer structure is a chemical structure radially and highly branched from one silicon atom. The aforementioned “i” specifying the total number of generations of the aforementioned silylalkyl group indicates the degree of branching. For example, in the case in which the total number of generations i is 1 and L^(i+1) is, for example, a methyl group, the aforementioned carbosiloxane dendrimer structure means the following structure.

wherein Z, p, R¹ and R² are the same as defined above; and a¹ is an integer ranging from 0 to 3.

In the same manner as described above, in the case in which the generation i is 2 and L^(i+1) is, for example a methyl group, the aforementioned carbosiloxane dendrimer structure means the following structure, wherein p=1.

wherein Z, R¹ and R² are the same as defined above; and a¹ and a² indicate an integer ranging from 0 to 3.

In addition, in the case in which the generation i is 3 and L^(i+1) is, for example, a methyl group, the aforementioned carbosiloxane dendrimer structure means the following structure wherein p=1.

wherein Z, R¹ and R² are the same as defined above; and a¹, a² and a³ indicate an integer ranging from 0 to 3.

As the aforementioned carbosiloxane dendrimer structures, in particular, the following structures are preferred.

wherein Z and R² are the same as defined above.

wherein Z and R² are the same as defined above.

The silylalkyl group having the aforementioned carbosiloxane dendrimer structure has a structure in which the carbosiloxane units are extended in the form of a dendrimer. For this reason, the aforementioned silylalkyl group is a functional group exhibiting increased water repellency (increased water resistance), as compared to linear or simply branched polysiloxane units. In addition, the aforementioned silylalkyl group having the carbosiloxanedendrimer structure is chemically stable, and for this reason, the silylalkyl group is a functional group providing advantageous properties such as usability in combination with various types of raw materials for use in cosmetics.

The aforementioned unsaturated monomer having the carbosiloxane dendrimer structure (A) is represented by, for example, the following formula (1′):

wherein Y is a radically-polymerizable unsaturation-containing group; and Z, p, R¹, R², L¹ and a^(i) are the same as defined above.

The aforementioned unsaturation-containing group is not particularly restricted as long as the group has a radically polymerizable unsaturation. As examples thereof, mention may be made of, for example, a vinyl group, an allyl group, a (meth)acryl group and the like.

The aforementioned unsaturated monomer having the carbosiloxane dendrimer structure (A) preferably has a group selected from the group consisting of an acryl or methacryl group-containing organic group represented by the following general formula:

wherein R⁴ is a hydrogen atom or a methyl group; and R⁵ is an alkylene group having 1 to 10 carbon atoms, or

wherein R⁴ and R⁵ are the same as defined above, an alkenylaryl group-containing organic group represented by the following general formula:

wherein R⁶ is a hydrogen atom or a methyl group; R⁷ is an alkyl group having 1 to 10 carbon atoms; R⁸ is an alkylene group having 1 to 10 carbon atoms; b is an integer ranging from 0 to 4; and c is 0 or 1, and an alkenyl group having 2 to 10 carbon atoms.

As examples of the aforementioned unsaturated monomers having the carbosiloxane dendrimer structure (A), mention may be made of, for example, those represented by the following formulae:

The aforementioned unsaturated monomer having the carbosiloxane dendrimer structure (A) can be produced in accordance with, for example, a method for producing a branched siloxane/silalkylene copolymer described in Japanese Unexamined Patent Application, First Publication No. H11-1530 (Japanese Patent Application No. H09-171154). For example, a silicon compound containing hydrogen atoms bonded to silicon atoms represented by the following general formula: Y—Si—(OSiR² ₂H)₃ wherein Y and R² are the same as defined above, and an alkenyl group-containing organic silicon compound are subjected to a hydrosilylation reaction. As the silicon compound represented by the aforementioned formula, for example, 3-methacryloxypropyl tris(dimethylsiloxy)silane, 3-acryloxypropyl tris(dimethylsiloxy)silane, or 4-vinylphenyl tris(dimethylsiloxy)silane is used. As the organic silicon compound containing an alkenyl group, for example, vinyl tris(trimethylsiloxy)silane, vinyl tris(dimethylphenylsiloxy)silane, or 5-hexenyl tris(trimethylsiloxy)silane is used. The aforementioned hydrosilylation reaction is preferably carried out in the presence of a transition metal catalyst such as chloroplatinic acid, a platinum-vinylsiloxane complex or the like.

The unsaturated monomer having at least one silicon-bonding alkoxy group (B) is not particularly restricted as long as a linear or branched alkoxy group having 1 to 22 carbon atoms, preferably having 1 to 12 carbon atoms, more preferably having 1 to 6 carbon atoms, furthermore preferably having 1 to 3 carbon atoms, and in particular, preferably having 1 or 2 carbon atoms and a radically-polymerizable unsaturation-containing group are possessed. The aforementioned alkoxy group may be either a non-substituted alkoxy group or an alkoxy group in which hydrogen atoms bonding to carbon atoms are at least partially substituted by a halogen atom such as a fluorine atom or the like, or an organic group containing a carbinol group, an epoxy group, a glycidyl group, an acyl group, a carboxyl group, an amino group, a methacryl group, a mercapto group, an amide group, an oxyalkylene group or the like. As examples of the aforementioned alkoxy group, mention may be made of a methoxy group, an ethoxy group, a propoxy group, a butoxy group and the like. A methoxy group or an ethoxy group is preferred. The number of the alkoxy groups bonding to a silicon atom is in the range of 1 to 3, is preferably 2 or 3 and is more preferably 3.

As examples of radically-polymerizable unsaturation-containing groups, mention may be made of groups derived from monovalent unsaturated carboxylic acids, or monovalent hydrocarbon groups having a carbon-carbon double bond at the molecular terminal as the unsaturation bond. For example, a vinyl group, an allyl group, a (meth)acryl group, a (meth)acryloxy group and the like may be mentioned.

As examples of the aforementioned unsaturated monomer having at least one silicon-bonding alkoxy group (B), mention may be made of, for example, methacryloxypropyl triethoxysilane, acryloxypropyl triethoxysilane, methacryloxypropyl trimethoxysilane, acryloxypropyl trimethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris(2-methoxyethoxy)silane and the like.

The aforementioned copolymer can be synthesized by copolymerizing the aforementioned unsaturated monomer having a carbosiloxane dendrimer structure (A) and the aforementioned unsaturated monomer having at least one silicon-bonding alkoxy group (B). In the copolymer in which the alkoxy group bonded to a silicon atom (alkoxysilyl group) is grafted on the main chain, durability of water repellency of powders which are subjected to a surface treatment is effectively improved, and the surface properties such as stability over time and the like are improved. For this reason, the aforementioned copolymer is preferably used. The copolymerization ratio with the aforementioned unsaturated monomer having at least one silicon-bonding alkoxy group (B) is not particularly restricted. The ratio of (weight of component (A))/(weight of all the monomers) preferably ranges from 0.02 to 0.70, more preferably ranges from 0.1 to 0.65, and further preferably ranges from 0.2 to 0.6. The ratio of (weight of component (B))/(weight of all the monomers) preferably ranges from 0 to 0.5, more preferably ranges from 0.05 to 0.45, and further preferably ranges from 0.1 to 0.4.

In addition to the aforementioned components (A) and (B), (C) at least one unsaturated monomer having no silicon-bonding alkoxy group may be copolymerized. As examples of the aforementioned unsaturated monomers having no silicon-bonding alkoxy group (C), mention may be made of, for example, (lower alkyl)acrylates or methacrylates such as methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, isopropyl acrylate, isopropyl methacrylate and the like; glycidyl acrylate and glycidyl methacrylate; (lower alkyl)acrylates or methacrylates having C₁₋₆ lower alkyl groups such as n-butyl acrylate, n-butyl methacrylate, isobutyl acrylate, isobutyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, n-hexyl acrylate, n-hexyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, and the like; (higher alkyl)acrylates or methacrylates such as 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, octyl acrylate, octyl methacrylate, lauryl acrylate, lauryl methacrylate, stearyl acrylate, stearyl methacrylate and the like; lower fatty acid vinyl esters such as vinyl acetate, vinyl propionate and the like; higher fatty acid esters such as vinyl butyrate, vinyl caproate, vinyl 2-ethylhexanoate, vinyl laurate, vinyl stearate and the like; aromatic vinyl-type monomers such as styrene, vinyltoluene, benzyl acrylate, benzyl methacrylate, phenoxyethyl acrylate, phenoxyethyl methacrylate, vinylpyrrolidone and the like; amino group-containing vinyl-based monomers such as dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl acrylate, diethylaminoethyl methacrylate and the like; amide group-containing vinyl-type monomers such as acrylamide, methacrylamide, N-methylolacrylamide, N-methylolmethacrylamide, N-methoxymethylacrylamide, N-methoxymethylmethacrylamide, isobutoxymethoxyacrylamide, isobutoxymethoxymethacrylamide, N,N-dimethylacrylamide, N,N-dimethylmethacrylamide and the like; hydroxyl group-containing vinyl-type monomers such as hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl alcohol acrylate, hydroxypropyl alcohol methacrylate and the like; carboxylic acid-containing vinyl-type monomers such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, fumaric acid, maleic acid and the like; ether bond-containing vinyl-type monomers such as tetrahydrofurfuryl acrylate, tetrahydrofurfuryl methacrylate, butoxyethyl acrylate, butoxyethyl methacrylate, ethoxy diethylene glycol acrylate, ethoxy diethylene glycol methacrylate, polyethylene glycol acrylate, polyethylene glycol methacrylate, polypropylene glycol monoacrylate, polypropylene glycol monomethacrylate, hydroxybutyl vinyl ether, cetyl vinyl ether, 2-ethylhexyl vinyl ether and the like; unsaturated group-containing silicone compounds such as polydimethylsiloxane containing an acryl group or a methacryl group at one terminal, polydimethylsiloxane having an alkenylaryl group at one terminal and the like; butadiene; vinyl chloride; vinylidene chloride; acrylonitrile, methacrylonitrile; dibutyl fumalate; maleic anhydride; dodecylsuccinic anhydride; acryl glycidyl ether, methacryl glycidyl ether, 3,4-epoxycylcohexylmethyl acrylate, 3,4-epoxycyclohexylmethyl methacrylate; alkali metal salts, ammonium salts, and organic amine salts of radically-polymerizable unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, fumaric acid, maleic acid and the like; radically-polymerizable unsaturated monomers having a sulfonic acid group such as styrene sulfonic acid and the like and alkali metal salts, ammonium salts organic amine salts thereof; quaternary ammonium salts derived from acrylic acids or methacrylic acids such as 2-hydroxy-3-methacryloxypropyl trimethylammonium chloride and the like; methacrylic esters of alcohols having tertiary amine groups such as methacrylic acid diethylamine ester and quaternary ammonium salts thereof. A lower alkyl acrylate or methacrylate having a C₁₋₆ lower alkyl group is preferred.

In addition, a polyfunctional vinyl-based monomer can also be used. As examples thereof, mention may be made of, for example, unsaturated group-containing silicone compounds such as trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, pentaerythritol triacrylate, pentaerythritol trimethacrylate, ethylene glycol diacrylate, ethylene glycol dimethacrylate, tetraethylene glycol diacrylate, tetraethylene glycol dimethacrylate, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, 1,4-butanediol diacrylate, 1,4-butanediol dimethacrylate, 1,6-hexanediol diacrylate, 1,6-hexanediol dimethacrylate, neopentylglycol diacrylate, neopentylglycol dimethacrylate, trimethylolpropane trioxyethylacrylate, trimethylolpropane trioxyethylmethacrylate, tris(2-hydroxyethyl) isocyanurate diacrylate, tris(2-hydroxyethyl) isocyanurate dimethacrylate, tris(2-hydroxyethyl) isocyanurate triacrylate, tris(2-hydroxyethyl) isocyanurate trimethacrylate, polydimethylsiloxane having both molecular-chain terminals capped with alkenylaryl groups and the like.

In addition, a vinyl-based monomer containing a fluorinated organic group may be used. The aforementioned vinyl-based monomer containing a fluorinated organic group is preferably one represented by the following general formula: CH₂═CR¹⁵COOR^(f). In the aforementioned formula, R¹⁵ is a hydrogen atom or a methyl group and R^(f) is a fluorinated organic group, and as examples thereof, mention may be made of a fluoroalkyl group or a fluoroalkyloxyfluoroalkylene group as described above. As examples of the aforementioned components (A), the compounds represented by the following formulae may be mentioned. In the following formulae, z is an integer ranging from 1 to 4. CH₂═CCH₃COO—CF₃, CH₂—CCH₃COO—C₂F₅, CH₂═CCH₃COO-nC₃F₇, CH₂═CCH₃COO—CF(CF₃)₂, CH₂═CCH₃COO-nC₄F₉, CH₂═CCH₃COO—CF₂CF(CF₃)₂, CH₂═CCH₃COO-nC₅F₁₁, CH₂═CCH₃COO-nC₈F₁₃, CH₂═CCH₃COO-nC₈F₁₇, CH₂═CCH₃COO—CH₂CF₃, CH₂═CCH₃COO—CH(CF₃)₂, CH₂═CCH₃COO—CH₂CH(CF₃)₂, CH₂═CCH₃COO—CH₂ (CF₂)₂F, CH₂═CCH₃COO—CH₂ (CF₂)₃F, CH₂═CCH₃COO—CH₂ (CF₂)₄F, CH₂═CCH₃COO—CH₂ (CF₂)₆F, CH₂═CCH₃COO—CH₂ (CF₂)₈F, CH₂═CCH₃COO—CH₂CH₂CF_(3r) CH₂═CCH₃COO—CH₂CH₂ (CF₂)₂F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₃F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₄F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₆F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₈F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₁₀F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₁₂F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₁₄F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₁₆F, CH₂═CCH₃COO—CH₂CH₂CH₂CF₃, CH₂═CCH₃COO—CH₂CH₂CH₂ (CF₂)₂F, CH₂═CCH₃COO—CH₂CH₂CH₂ (CF₂)₂H, CH₂═CCH₃COO—CH₂ (CF₂)₄H, CH₂—CCH₃COO—CH₂CH₂ (CF₂)₃H, CH₂═CCH₃COO—CH₂CH₂CF(CF₃)—[OCF₂CF(CF₃)]_(z)—OC₃F₇, CH₂═CCH₃COO—CH₂CH₂CF₂CF₂—[OCF₂CF(CF₂)]_(z)—OC₃F₇CH₂═CHCOO—CF₂, CH₂═CHCOO—C₂F₅, CH₂═CHCOO-nC₃F₇, CH₂═CHCOO—CF(CF₃)₂, CH₂═CHCOO-nC₄F₉, CH₂═CHCOO—CF₂CF(CF₃)₂, CH₂═CHCOO-nC₅F₁₁, CH₂═CHCOO-nC₆F₁₃, CH₂═CHCOO-nC₈F₁₇, CH₂═CHCOO—CH₂CF₃, CH₂═CHCOO—CH(CF₃)₂, CH₂═CHCOO—CH₂CH(CF₃)₂, CH₂═CHCOO—CH₂ (CF₂)₂F, CH₂═CHCOO—CH₂ (CF₂)₃F, CH₂═CHCOO—CH₂ (CF₂)₄F, CH₂═CHCOO—CH₂ (CF₂)₆F, CH₂═CHCOO—CH₂ (CF₂)₈F, CH₂═CHCOO—CH₂CH₂CF₃, CH₂═CHCOO—CH₂CH₂ (CF₂)₂F, CH₂═CHCOO—CH₂CH₂ (CF₂)₃F, CH₂═CHCOO—CH₂CH₂ (CF₂)₄F, CH₂═CHCOO—CH₂CH₂ (CF₂)₆F, CH₂═CHCOO—CH₂CH₂ (CF₂)₈F, CH₂═CHCOO—CH₂CH₂ (CF₂)₁₀F, CH₂═CHCOO—CH₂CH₂ (CF₂)₁₂F, CH₂═CHCOO—CH₂CH₂ (CF₂)₁₄F, CH₂═CHCOO—CH₂CH₂ (CF₂)₁₆F, CH₂═CHCOO—CH₂CH₂CH₂CF₃, CH₂═CHCOO—CH₂CH₂CH₂ (CF₂)₂F, CH₂═CHCOO—CH₂CH₂CH₂ (CF₂)₂H, CH₂═CHCOO—CH₂ (CF₂)₄H, CH₂═CHCOO—CH₂CH₂ (CF₂)₃H, CH₂═CHCOO—CH₂CH₂CF(CF₃)—[OCF₂CF(CF₃)]_(z)—OC₃F₇, and CH₂═CHCOO—CH₂CH₂CF₂CF₂—[OCF₂CF(CF₃)]_(z)—OC₃F₇. Among these, the vinyl monomers represented by the following formulae are preferred.

CH₂═CHCOO—CH₂CH₂ (CF₂)₆F, CH₂═CHCOO—CH₂CH₂ (CF₂)₈F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₆F, CH₂═CCH₃COO—CH₂CH₂ (CF₂)₈F, CH₂═CHCOO—CH₂CF₃, and CH₂═CCH₃COO—CH₂CF₃.

In particular, the vinyl monomers represented by the following formulae are more preferred.

CH₂═CHCOO—CH₂CF₃ and CH₂═CCH₃COO—CH₂CF₃.

The polymerization ratio of the aforementioned component (C) is not restricted, and can be appropriately determined within the range of 0.01 to 0.98 of the ratio of (weight of component (C))/(weight of all the monomers constituting the copolymer). The ratio of (weight of component (C))/(weight of all the monomers constituting the copolymer) preferably ranges from 0.01 to 0.75 and more preferably ranges from 0.20 to 0.60.

In particular, the copolymer blended in the surface-treatment agent for powders for use in cosmetics of the present invention is preferably obtained by copolymerizing the aforementioned unsaturated monomer having the carbosiloxane dendrimer structure (A), the unsaturated monomer having at least one silicon-bonding alkoxy group (B) and at least one unsaturated monomer having no silicon-bonding alkoxy group (C) in a weight ratio satisfying the conditions of {(weight of component (A))/(weight of all the monomers)}:{(weight of component (B))/(weight of all the monomers)}:{(weight of component (C))/(weight of all the monomers)} in the range of (0.02 to 0.7):(0.05 to 0.45):(0.01 to 0.75). The copolymer preferably satisfies the conditions of the aforementioned ratio ranging from (0.02 to 0.7):(0.05 to 0.45):(0.01 to 0.75), and {(weight of component (A))/(weight of all the monomers)}≧{(weight of component (B))/(weight of all the monomers)}. In the copolymer obtained in the aforementioned weight ratio, the silylalkyl group having the carbosiloxane dendrimer structure and the alkoxy group bonding to a silicon atom are grafted on the main chain in the specified ratio. For this reason, the aforementioned copolymer has an advantage in that durability of water repellency of the surface-treated powders is effectively improved, and the stability over time, surface properties, and sensation during use thereof can be further improved, as compared with copolymers having no silicon-bonding alkoxy group (no alkoxysilyl group). For this reason, the copolymer is, in particular, preferably used as the surface-treatment agent for powders for use in cosmetics of the present invention. In addition, a part or all parts of the aforementioned component (C) can most preferably be an unsaturated monomer having a C₁₋₆ lower alkyl group, and can provide the most improvements in stability over time, surface properties, and sensation during use as the surface-treatment agent for powders for use in cosmetics can be obtained.

As the copolymerization method, a radical polymerization method or an ion polymerization method may be used. In particular, a radical polymerization method is preferred, and a solution polymerization method is, in particular, preferably used. The aforementioned solution polymerization method is carried out by reacting the aforementioned unsaturated monomers in a solvent in the presence of a radical initiator for 3 to 20 hours under the temperature condition ranging from 50 to 150° C. As examples of the solvents used herein, mention may be made of aliphatic hydrocarbons such as hexane, octane, decane, cyclohexane and the like; aromatic hydrocarbons such as benzene, toluene, xylene and the like; ethers such as diethyl ether, dibutyl ether, tetrahydrofuran, dioxane and the like; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone and the like; esters such as methyl acetate, ethyl acetate, butyl acetate, isobutyl acetate and the like; alcohols such as methanol, ethanol, isopropyl alcohol, butanol and the like; organosiloxane oligomers such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, hexamethyldisiloxane, octamethyltrisiloxane and the like. As the radical initiator, conventionally known compounds generally used in radical polymerization methods can be employed. As examples thereof, mention may be made of azobis-based compounds such as 2,2′-azobis(isobutyronitrile), 2,2′-azobis(2-methylbutyronitrile), 2,2′-azobis(2,4-dimethylvaleronitrile), dimethyl-2,2′-azobis(2-methyl propionate) and the like; and organic peroxides such as benzoyl peroxide, lauroyl peroxide, tert-butyl peroxybenzoate, tert-butyl peroxy-2-ethylhexanoate and the like. The aforementioned radical initiators may be used alone or in combination of two or more types thereof. The usage amount of the radical initiator preferably ranges from 0.1 to 5 parts by weight with respect to 100 parts by weight of the total of the aforementioned component (A) to component (C). In addition, at the time of polymerization, a chain transfer agent can be added. As examples of the chain transfer agent, mention may be made of mercapto compounds such as 2-mercaptoethanol, butylmercaptan, n-dodecylmercaptan, 3-mercaptopropyltrimethoxysilane, polydimethylsiloxane having a mercaptopropyl group and the like; and halogenated products such as methylene chloride, chloroform, carbon tetrachloride, butyl bromide, 3-chloropropyltrimethoxysilane and the like.

After the polymerization, purification can be carried out by means of a method in which the remaining unreacted vinyl-based monomers are removed by heating under reduced pressure or a method in which a deodorant treatment due to a hydrogenation reaction without a solvent or with a solvent is carried out and light components are removed by distillation by contacting with a nitrogen gas under reduced pressure. In particular, in the case of using as an agent for external use in which reduction of odors and miscibility with other cosmetic components are needed, a purified product obtained as described above is preferably used. In the aforementioned hydrogenation reaction and stripping step, solvents, reaction conditions, reducing pressure conditions and the like used in the purification of the publicly known organopolysiloxane copolymers can be used without any restrictions and can be freely selected.

In order to further improve adhesive properties of the vinyl-based polymer with respect to skin or hair, or provide appropriate cleansing properties after use, an amino group may be introduced into the side chain of the aforementioned vinyl-based polymer by using an amino group-containing vinyl-based monomer such as dimethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl acrylate, diethylaminoethyl methacrylate or the like at a part of the aforementioned component (C), followed by modifying this with an alkali metal salt, an ammonium salt or an amine salt of a halogenated fatty acid such as a potassium salt of monochloroacetic acid, an ammonium salt of monochloroacetic acid, an aminomethylpropanol salt of monochloroacetic acid, a triethanolamine salt of monobromoacetic acid, a sodium salt of monochloropropionic acid or the like. Alternatively, a carboxylic acid group may be introduced into the side chain of the aforementioned vinyl-based polymer by using a carboxylic acid-containing vinyl-based monomer such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, fumaric acid, maleic acid or the like at a part of the aforementioned component (C), followed by neutralizing this with an amine such as triethylamine, diethylamine, triethanolamine or the like.

The number average molecular weight of the aforementioned copolymer preferably ranges from 3,000 to 2,000,000 and more preferably ranges from 5,000 to 800,000 in view of ease of blending in the cosmetics. As examples of the forms thereof, mention may be made of a liquid, a gum, a paste, a solid and a powder. At the time of blending in the cosmetics, the form of a solution or dispersion in which the copolymer is diluted with a solvent or a powder is preferred.

The aforementioned copolymer possesses a film-forming property, and a film is formed on the surface of powders. Thereby, the surface properties of the powders can change into water repellency. Therefore, the surface-treatment agent of the present invention can be preferably used for making powders water repellent. In addition, hydrogen is not generated, and therefore, this is safe.

The surface-treatment agent of the present invention can suitably be used in a surface treatment of any powders for use in, in particular, cosmetics (containing powders and pigments used as coloring agents), and treated powders exhibiting improved feeling on touch during use and possessing superior water resistance, sebum resistance or the like can be obtained. With respect to powders and/or coloring agents, there is no restriction on the form thereof (sphere, needle, plate or the like), the particle size (aerosol, microparticle, pigment-grade, or the like), and the particle structure (porous, non-porous or the like) thereof, and any one thereof can be used, as long as the powders are commonly used in cosmetics. As examples thereof, mention may be made of inorganic powders, organic powders, surfactant metal salt powders, colored pigments, pearl pigments, metal powder pigments, tar pigments, natural pigments and the like. The aforementioned powders are preferably at least one type of powders selected from inorganic powders, organic powders, and resin powders, having an average particle size ranging from 1 nm to 20 μm.

More particularly, as examples of inorganic powders, mention may be made of titanium oxide, zirconium oxide, zinc oxide, cerium oxide, magnesium oxide, barium sulfate, calcium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, talc, mica, kaolin, sericite, white mica, synthetic mica, phlogopite, lepidolite, black mica, lithia mica, silicic acid, silicic acid anhydride, aluminum silicate, magnesium silicate, aluminum magnesium silicate, calcium silicate, barium silicate, strontium silicate, metal salts of tungstic acid, hydroxyapatite, vermiculite, higilite, bentonite, montmorillonite, hectorite, zeolite, ceramic powder, dicalcium phosphate, alumina, aluminum hydroxide, boron nitride, silica and the like. As examples of organic powders, mention may be made of polyamide powder, polyester powder, polyethylene powder, polypropylene powder, polystyrene powder, polyurethane powder, benzoguanamine powder, polymethylbenzoguanamine powder, tetrafluoroethylene powder, poly(methyl methacrylate) powder, cellulose, silk powder, nylon powder, nylon 12, nylon 6, silicone powder, copolymers of styrene and acrylic acid, copolymers of divinylbenzene and styrene, vinyl resin, urea resin, phenol resin, fluorine resin, silicon resin, acrylic resin, melamine resin, epoxy resin, polycarbonate resin, microcrystalline fiber powder, starch powder, lauroyl lysine and the like. As examples of surfactant metal salt powders (metallic soaps), mention may be made of zinc stearate, aluminum stearate, calcium stearate, magnesium stearate, zinc myristate, magnesium myristate, zinc cetylphosphate, calcium cetylphosphate, sodium zinc cetylphosphate, and the like. As examples of colored pigments, mention may be made of inorganic red pigments such as iron oxide, iron hydroxide, iron titanate and the like; inorganic brown pigments such as gamma-iron oxide and the like; inorganic yellow pigments such as yellow iron oxide, ocher, and the like; inorganic black iron pigments such as black iron oxide, carbon black and the like; inorganic purple pigments such as manganese violet, cobalt violet, and the like; inorganic green pigments such as chromium hydroxide, chromium oxide, cobalt oxide, cobalt titanate, and the like; inorganic blue pigments such as Prussian blue, ultramarine blue, and the like; laked tar pigments, laked natural pigments, and synthetic resin powders in which the aforementioned powders are subjected to hybridization, and the like. As examples of pearl pigments, mention may be made of titanium oxide-coated mica, titanium oxide-coated mica, bismuth oxychloride, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, fish scale foil, titanium oxide-coated colored mica, and the like. As examples of metal powder pigments, mention may be made of powders of metals such as aluminum powder, copper powder, stainless steel powder, and the like. As examples of tar pigments, mention may be made of Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 505, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Yellow No. 204, Yellow No. 401, Blue No. 1, Blue No. 2, Blue No. 201, Blue No. 404, Green No. 3, Green No. 201, Green No. 204, Green No. 205, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 206, Orange No. 207 and the like. As examples of natural pigments, mention may be made of carminic acid, laccaic acid, carthamin, brazilin, crocin and the like. The aforementioned powders may be hybridized within a range which does not impair the effects of the present invention, or may be made hydrophilic or hydrophobic with a general oil agent, a silicone oil, a fluorine compound, a surfactant or the like. One type thereof or two or more types thereof may be used, if necessary.

In the case of surface-treating powders for use in cosmetics with the surface-treatment agent for powders for use in cosmetics of the present invention, the treatment method can be carried out by means of, for example, a dry method in which the surface-treatment agent for powders for use in cosmetics of the present invention and powders to be treated are subjected to dry mixing, or a wet method in which the surface-treatment agent for powders for use in cosmetics of the present invention is dispersed in a solvent, powders to be treated are further mixed therewith to carry out wet mixing, followed by drying treated powders. The surface-treatment methods are not restricted thereto. In addition, the surface treatment can also be carried out as follows: the surface-treatment agent for powders for use in cosmetics of the present invention is diluted with an oil agent or agents for use in cosmetics, and the obtained composition is mixed with powders to form a dispersion in the form of a slurry.

In the case of surface-treating powders for use in cosmetics with the surface-treatment agent for powders for use in cosmetics of the present invention, a wet method is more preferred. In the wet method, the mixing temperature is not particularly restricted, and preferably ranges from 60 to 80° C. In addition, the mixing period varies in accordance with the amount to be treated, types of powders and the like, and usually ranges from 1 hour to 3 hours.

In the case of surface-treating powders for use in cosmetics with the surface-treatment agent for powders for use in cosmetics of the present invention, the usage amount thereof varies in accordance with types of the powders, and usually, preferably ranges from 1 to 10% by weight, and more preferably ranges from 1 to 5% by weight. If the usage amount is below 1% by weight, effects of improving feeling on touch and the like may not be sufficiently obtained in the case of blending in a cosmetic. On the other hand, if the amount exceeds 10% by weight, impaired feeling on touch such as a heavy feeling during spreading and the like may be exhibited.

The cosmetic of the present invention contains powders for use in cosmetics which are subjected to a surface treatment with the aforementioned surface-treatment agent for powders for use in cosmetics of the present invention.

The blending amount of powders treated by the aforementioned surface-treatment agent in a cosmetic is not particularly restricted. The cosmetic of the present invention can contain the aforementioned powders in an amount ranging from 1 to 99% by weight on the basis of the total weight of the cosmetic. More particularly, the blending amount of the aforementioned powders can appropriately vary in accordance with types of cosmetics, such as in the range of 10 to 90% by weight, 20 to 80% by weight or 30 to 70% by weight.

The cosmetic of the present invention can further comprise an oil agent or agents. As examples of the oil agents, mention may be made of animal oils, vegetable oils, synthetic oils and the like, which are generally used in cosmetics. The aforementioned oil agents may be derived from any origins, may be in the form of a solid, a semi-solid, or a liquid, and may be non-volatile, semi-volatile or volatile, as long as they are hydrophobic. The oil agents are used in order to provide lubricity to skin or hair, make skin flexible, and provide a moisturizing sensation.

As the aforementioned oil agents, silicone oils are preferred. The silicone oils are hydrophobic as long as they are oil agents, and the molecular structure thereof may be a cyclic, linear or branched structure. The viscosity of the silicone oils at 25° C. usually ranges from 0.65 to 100,000 mm²/s and preferably ranges from 0.65 to 10,000 mm²/s.

As examples of the aforementioned silicone oils, mention may be made of cyclic organopolysiloxanes, linear organopolysiloxanes, and branched organopolysiloxanes. Among these, volatile linear organopolysiloxanes, branched organopolysiloxanes, and cyclic organopolysiloxanes are preferred.

As the aforementioned silicone oils, for example, organopolysiloxanes represented by the following general formula (3) or (4):

wherein R⁹ is a hydrogen atom, a hydroxyl group or a group selected from monovalent non-substituted or fluorine- or amino-substituted C₁₋₃₀ alkyl groups, aryl groups, alkoxy groups and groups represented by (CH₃)₃SiO{(CH₃)₂SiO}₁Si(CH₃)₂CH₂CH₂—, wherein 1 is an integer ranging from 0 to 1,000; a′ is an integer ranging from 0 to 3; b′ is an integer ranging from 0 to 1,000; and c′ is an integer ranging from 0 to 1,000, with the proviso that 1≦b′+c′≦2,000,

wherein R⁹ is the same as defined above; d is an integer ranging from 0 to 8; and e is an integer ranging from 0 to 8, with the proviso that with the proviso that 3≦d+e≦8, can be used.

As examples of monovalent, non-substituted or fluorine- or amino-substituted alkyl groups, aryl groups, and alkoxy groups, having 1 to 30 carbon atoms, mention may be made of, for example, linear or branched alkyl groups having 1 to 30 carbon atoms such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a decyl group, a dodecyl group and the like; cycloalkyl groups having 3 to 30 carbon atoms such as a cylopentyl group, a cyclohexyl group and the like; aryl groups having 6 to 30 carbon atoms such as a phenyl group, a tolyl group, a xylyl group, a naphthyl group and the like; alkoxy groups having 1 to 30 carbon atoms such as a methoxy group, an ethoxy group, a propoxy group and the like; and substituted groups thereof, in which hydrogen atoms bonded to carbon atoms of the aforementioned groups are at least partially substituted by a fluorine atom or an amino group. A non-substituted alkyl group or aryl group is preferred, and a non-substituted alkyl group having 1 to 6 carbon atoms or aryl group is further preferred. A methyl group, an ethyl group or a phenyl group is, in particular, preferred.

More particularly, as examples of the silicone oils having the aforementioned structures, the following organopolysiloxanes may be mentioned. As examples of cyclic organopolysiloxanes, mention may be made of hexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), dodecamethylcyclohexasiloxane (D6), 1,1-diethylhexamethylcyclotetrasiloxane, phenylheptamethylcyclotetrasiloxane, 1,1-diphenylhexamethylcyclotetrasiloxane, 1,3,5,7-tetravinyltetramethylcyclotetrasiloxane, 1,3,5,7-tetramethylcyclotetrasiloxane, 1,3,5,7-tetracyclohexyltetramethylcyclotetrasiloxane, tris(3,3,3-trifluoropropyl)trimethylcyclotrisiloxane, 1,3,5,7-tetra(3-methacryloxypropyl)tetramethylcyclotetrasilo xane, 1,3,5,7-tetra(3-acryloxypropyl)tetramethylcyclotetrasiloxane, 1,3,5,7-tetra(3-carboxypropyl)tetramethylcyclotetrasiloxane, 1,3,5,7-tetra(3-vinyloxypropyl)tetramethylcyclotetrasiloxane, 1,3,5,7-tetra(p-vinylphenyl)tetramethylcyclotetrasiloxane, 1,3,5,7-tetra[3-(p-vinylphenyl)propyl]tetramethylcyclotetras iloxane, 1,3,5,7-tetra(N-acryloyl-N-methyl-3-aminopropyl)tetramethylc yclotetrasiloxane, 1,3,5,7-tetra(N,N-bis(lauroyl)-3-aminopropyl)tetramethylcycl otetrasiloxane and the like.

As examples of linear organopolysiloxanes, mention may be made of a dimethylpolysiloxane in which both molecular terminals are capped with trimethylsiloxy groups (dimethylsilicone with a low viscosity such as 2 cst or 6 cst to dimethylsilicone with a high viscosity such as 1,000,000 cst), an organohydrogenpolysiloxane, a methylphenylpolysiloxane in which both molecular terminals are capped with trimethylsiloxy groups, a copolymer of methylphenylsiloxane and dimethylsiloxane in which both molecular terminals are capped with trimethylsiloxy groups, a diphenylpolysiloxane in which both molecular terminals are capped with trimethylsiloxy groups, a copolymer of diphenylsiloxane and dimethylsiloxane in which both molecular terminals are capped with trimethylsiloxy groups, a trimethylpentaphenyltrisiloxane, a phenyl(trimethylsiloxy)siloxane, a methylalkylpolysiloxane in which both molecular terminals are capped with trimethylsiloxy groups, a copolymer of methylalkylsiloxane and dimethylpolysiloxane in which both molecular terminals are capped with trimethylsiloxy groups, a copolymer of methyl(3,3,3-trifluoropropyl)siloxane and dimethylsiloxane in which both molecular terminals are capped with trimethylsiloxy groups, an α, ω-dihydroxypolydimethylsiloxane, an α, ω-diethoxypolydimethylsiloxane, a 1,1,1,3,5,5,5-heptamethyl-3-octyltrisiloxane, a 1,1,1,3,5,5,5-heptamethyl-3-dodecyltrisiloxane, a 1,1,1,3,5,5,5-heptamethyl-3-hexadecyltrisiloxane, a tristrimethylsiloxymethylsilane, a tristrimethylsiloxyalkylsilane, a tetrakistrimethylsiloxysilane, tetramethyl-1,3-dihydroxydisiloxane, an octamethyl-1,7-dihydroxytetrasiloxane, a hexamethyl-1,5-diethoxytrisiloxane, a hexamethyldisiloxane, an octamethyltrisiloxane, a higher alkoxy-modified silicone, a higher fatty acid-modified silicone and the like.

As examples of branched organopolysiloxanes, mention may be made of methyltristrimethylsiloxysilane, ethyltristrimethylsiloxysilane, propyltristrimethylsiloxysilane, tetrakistrimethylsiloxysilane, phenyltristrimethylsiloxysilane and the like.

When at least one of the aforementioned silicone oils is contained in the cosmetic of the present invention, the stability of the cosmetic over time can be improved, and a refreshing feeling on touch which the silicone oils inherently possess can be realized.

The oil agents other than the silicone oils are preferably in the form of a liquid at 5 to 100° C. As the oil agents other than the silicone oils, hydrocarbon oils and/or fatty acid ester oils are preferred. They may be used alone, but preferably used in combination with the aforementioned silicone oils. By using the aforementioned silicone oils in combination with the hydrocarbon oils and/or fatty acid ester oils, advantages can be obtained in that moisture on the skin can be maintained, and a moisturizing sensation (also referred to as “moisturizing feeling on touch”) such as moisturizing skin or hair and smooth feeling on touch, in addition to the refreshing feeling on touch which the silicone oils inherently possess, can be provided in cosmetics, and the stability over time of cosmetics is not impaired. In addition, use of the cosmetics containing the aforementioned silicone oils in combination with the hydrocarbon oils and/or fatty acid ester oils provides advantages in that the aforementioned moisturizing components can be stably and uniformly applied on the skin or hair, the moisturizing effects of the moisturizing components on the skin are increased, and superior smoothness and moisturizing feeling can be provided as compared with cosmetics containing only oil agents other than silicone oils (the hydrocarbon oils and/or fatty acid ester oils).

As examples of hydrocarbon oils, mention may be made of liquid paraffin, light liquid isoparaffin, heavy liquid isoparaffin, vaseline, n-paraffin, isoparaffin, isododecane, isohexadecane, polyisobutylene, hydrogenated polyisobutylene, polybutene, ozokerite, ceresin, microcrystalline wax, paraffin wax, polyethylene wax, polyethylene/polypropylene wax, squalane, squalene, pristane, polyisoprene and the like.

As examples of fatty acid ester oils, mention may be made of hexyldecyl octanoate, cetyl octanoate, isopropyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, oleyl oleate, decyl oleate, octyldodecyl myristate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, diethyl phthalate, dibutyl phthalate, lanolin acetate, ethylene glycol monostearate, propylene glycol monostearate, propylene glycol dioleate, glyceryl monostearate, glyceryl monooleate, glyceryl tri-2-hexanoate, trimethylolpropane tri-2-ethylhexanoate, ditrimethylolpropane triethylhexanoate, ditrimethylolpropane isostearate/sebacate, trimethylolpropane trioctanoate, trimethylolpropane triisostearate, diisopropyl adipate, diisobutyl adipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, diisostearyl malate, hydrogenated castor oil monoisostearate, N-alkylglycol monoisostearate, octyldodecyl isostearate, isopropyl isostearate, isocetyl isostearate, ethylene glycol di-2-ethylhexanoate, cetyl 2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, octyldodecyl gum ester, ethyl oleate, octyldodecyl oleate, neopentylglycol dicaprate, triethyl citrate, 2-ethylhexyl succinate, dioctyl succinate, isocetyl stearate, diisopropyl sebacate, di-2-ethylhexyl sebacate, diethyl sebacate, dioctyl sebacate, dibutyloctyl sebacate, cetyl palmitate, octyldodecyl palmitate, octyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, cholesteryl 12-hydroxystearate, dipentaerythritol fatty acid ester, 2-hexyldecyl myristate, ethyl laurate, 2-octyldodecyl N-lauroyl-L-glutamate, di(cholesteryl/behenyl/octyldodecyl) N-lauroyl-L-glutamate, di(cholesteryl/octyldodecyl) N-lauroyl-L-glutamate, di(phytosteryl/behenyl/octyldodecyl) N-lauroyl-L-glutamate, di(phytosteryl/octyldodecyl) N-lauroyl-L-glutamate, isopropyl N-lauroylsarcosinate, diisostearyl malate, neopentylglycol dioctanoate, isodecyl neopentanoate, isotridecyl neopentanoate, isostearyl neopentanoate, isononyl isononanoate, isotridecyl isononanoate, octyl isononanoate, isotridecyl isononanoate, diethylpentanediol dineopentanoate, methylpentanediol dineopentanoate, octyldodecyl neodecanoate, 2-butyl-2-ethyl-1,3-propanediol dioctanoate, pentaerythrityl tetraoctanoate, dipentaerythrityl hydrogenated rosin, pentaerythrityl triethylhexanoate, dipentaerythrityl (hydroxystearate/stearate/rosinate), polyglyceryl tetraisostearate, polyglyceryl-10 nonaisostearate, polyglyceryl-8 deca(erucate/isostearate/ricinoleate), (hexyldecanoic acid/sebacic acid)diglyceryl oligoester, glycol distearate (ethyleneglycol distearate), diisopropyl dimmer dilinoleate, diisostearyl dimmer dilinoleate, di(isostearyl/phytosteryl) dimmer dilinoleate, (phytosteryl/behenyl) dimmer dilinoleate, (phytosteryl/isostearyl/cetyl/stearyl/behenyl) dimmer dilinoleate, dimmer dilinoleyl dimmer dilinoleate, dimmer dilinoleyl diisostearate, dimmer dilinoleyl hydrogenated rosin condensate, dimmer dilinoleic acid hardened castor oil, hydroxyalkyl dimmer dilinoleyl ether, glyceryl triisooctanoate, glyceryl triisostearate, glyceryl trimyristate, glyceryl triisopalmitate, glyceryl trioctanoate, glyceryl trioleate, glyceryl diisostearate, glyceryl tri(caprylate/caprate), glyceryl tri(caprylate/caprate/myristate/stearate), hydrogenated rosin triglyceride (hydrogenated ester gum), rosin triglyceride (ester gum), glyceryl behenate eicosane dioate, glyceryl di-2-heptylundecanoate, diglyceryl myristate isostearate, cholesteryl acetate, cholesteryl nonanoate, cholesteryl stearate, cholesteryl isostearate, cholesteryl oleate, cholesteryl 12-hydroxystearate, cholesteryl ester of macadamia nut oil fatty acid, phytosteryl ester of macadamia nut oil fatty acid, phytosteryl isostearate, cholesteryl ester of soft lanolin fatty acid, cholesteryl ester of hard lanolin fatty acid, cholesteryl ester of long-chain branched fatty acid, cholesteryl ester of long-chain α-hydroxy fatty acid, octyldodecyl ricinoleate, octyldodecyl ester of lanolin fatty acid, octyldodecyl erucate, isostearic acid hardened castor oil, ethyl ester of avocado fatty acid, isopropyl ester of lanolin fatty acid, and the like.

In addition thereto, fats and oils, higher alcohols, higher fatty acids, fluorine-based oils and the like may be used in combination of two or more types thereof. For example, the oil agents described below may also be used in combination of two or more types. Hereinafter, the oil agents other than silicone oils, hydrocarbon oils and fatty acid ester oils, which can be used in the present invention, are described in detail.

As examples of natural animal or vegetable fats and oils and semi-synthetic fats and oils, mention may be made of avocado oil, linseed oil, almond oil, ibota wax, perilla oil, olive oil, cacao butter, kapok wax, kaya oil, carnauba wax, liver oil, candelilla wax, beef tallow, neat's-foot oil, beef bone fat, hydrogenated beef tallow, apricot kernel oil, spermaceti wax, hydrogenated oil, wheat germ oil, sesame oil, rice germ oil, rice bran oil, sugar cane wax, sasanqua oil, safflower oil, shear butter, Chinese tung oil, cinnamon oil, jojoba wax, squalane, shellac wax, turtle oil, soybean oil, tea seed oil, camellia oil, evening primrose oil, corn oil, lard, rapeseed oil, Japanese tung oil, rice bran wax, germ oil, horse fat, persic oil, palm oil, palm kernel oil, castor oil, hydrogenated castor oil, castor oil fatty acid methyl ester, sunflower oil, grape oil, bayberry wax, jojoba oil, hydrogenated jojoba ester, macadamia nut oil, beeswax, mink oil, cottonseed oil, cotton wax, Japanese wax, Japanese wax kernel oil, montan wax, coconut oil, hydrogenated coconut oil, tri-coconut oil fatty acid glyceride, mutton tallow, peanut oil, lanolin, liquid lanolin, reduced lanolin, lanolin alcohol, hard lanolin, lanolin acetate, lanolin fatty acid isopropyl ester, POE lanolin alcohol ether, POE lanolin alcohol acetate, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, egg yolk oil and the like, with the proviso that POE means polyoxyethylene.

As examples of higher alcohols, mention may be made of lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol, behenyl alcohol, hexadecyl alcohol, oleyl alcohol, isostearyl alcohol, hexyldodecanol, octyldodecanol, cetostearyl alcohol, 2-decyltetradecinol, cholesterol, sitosterol, phytosterol, lanosterol, POE cholesterol ether, monostearyl glycerol ether (batyl alcohol), monooleyl glyceryl ether (selachyl alcohol) and the like.

As examples of higher fatty acids, mention may be made of, for example, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, undecylenic acid, oleic acid, linolic acid, linolenic acid, arachidonic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), isostearic acid, 12-hydroxystearic acid, and the like.

As examples of fluorine-based oils, mention may be made of perfluoro polyether, perfluorodecalin, perfluorooctane and the like.

In the cosmetics of the present invention, one or more surfactants selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants and semi-polar surfactants can be used together.

Hereinafter, they are described in detail. As examples of anionic surfactants, mention may be made of saturated or unsaturated fatty acid salts such as sodium laurate, sodium stearate, sodium oleate, sodium linoleate and the like; alkylsulfuric acid salts; alkylbenzenesulfonic acids such as hexylbenzenesulfonic acid, octylbenzenesulfonic acid, dodecylbenzenesulfonic acid and the like, as well as salts thereof; polyoxyalkylene alkyl ether sulfuric acid salts; polyoxyalkylene alkenyl ether sulfuric acid salts; polyoxyethylene alkylsulfuric ester salts; sulfosuccinic acid alkyl ester salts; polyoxyalkylene sulfosuccinic acid alkyl ester salts; polyoxyalkylene alkylphenyl ether sulfuric acid salts; alkanesulfonic acid salts; octyltrimethylammonium hydroxide; dodecyltrimethylammonium hydroxide; alkyl sulfonates; polyoxyethylene alkylphenyl ether sulfuric acid salts; polyoxyalkylene alkyl ether acetic acid salts; alkyl phosphoric acid salts; polyoxyalkylene alkyl ether phosphoric acid salts; acylglutamic acid salts; α-acylsulfonic acid salts; alkylsulfonic acid salts; alkylallylsulfonic acid salts; α-olefinsulfonic acid salts; alkylnaphthalene sulfonic acid salts; alkanesulfonic acid salts; alkyl- or kenylsulfuric acid salts; alkylamidesulfuric acid salts; alkyl- or alkenylphosphoric acid salts; alkylamidephosphoric acid salts; alkyloylalkyl taurine salts; N-acylamino acid salts; sulfosuccinic acid salts; alkyl ether carboxylic acid salts; amide ether carboxylic acid salts; α-sulfofatty acid ester salts; alanine derivatives; glycine derivatives; and arginine derivatives. As examples of salts, mention may be made of alkali metal salts such as a sodium salt and the like, alkaline earth metal salts such as a magnesium salt and the like, alkanolamine salts such as a triethanolamine salt and the like, and ammonium salts.

As examples of cationic surfactants, mention may be made of alkyltrimethylammonium chloride, stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, beef tallow alkyltrimethylammonium chloride, behenyltrimethylammonium chloride, stearyltrimethylammonium bromide, behenyltrimethylammonium bromide, distearyldimethylammonium chloride, dicocoyldimethylammonium chloride, dioctyldimethylammonium chloride, di(POE) oleylmethylammonium (2EO) chloride, benzalkonium chloride, alkyl benzalkonium chloride, alkyl dimethylbenzalkonium chloride, benzethonium chloride, stearyl dimethylbenzylammonium chloride, lanolin derivative quaternary ammonium salt, stearic acid diethylaminoethylamide, stearic acid dimethylaminopropylamide, behenic acid amide propyldimethylhydroxypropylammonium chloride, stearoyl colaminoformyl methylpyridinium chloride, cetylpyridinium chloride, tall oil alkylbenzyl hydroxyethylimidazolinium chloride, and benzylammonium salt.

As examples of nonionic surfactants, mention may be made of polyoxyalkylene ethers, polyoxyalkylene alkyl ethers, polyoxyalkylene fatty acid esters, polyoxyalkylene fatty acid diesters, polyoxyalkylene resin acid esters, polyoxyalkylene (hardened) castor oils, polyoxyalkylene alkyl phenols, polyoxyalkylene alkyl phenyl ethers, polyoxyalkylene phenyl phenyl ethers, polyoxyalkylene alkyl esters, polyoxyalkylene alkyl esters, sorbitan fatty acid esters, polyoxyalkylene sorbitan alkyl esters, polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene sorbitol fatty acid esters, polyoxyalkylene glycerol fatty acid esters, polyglycerol alkyl ethers, polyglycerol fatty acid esters, sucrose fatty acid esters, fatty acid alkanolamides, alkylglucosides, polyoxyalkylene fatty acid bisphenyl ethers, polypropylene glycol, diethylene glycol, polyoxyalkylene-modified silicones, polyglyceryl-modified silicones, glyceryl-modified silicones, sugar-modified silicones, fluorine-based surfactants, polyoxyethylene/polyoxypropylene block polymers, and alkyl polyoxyethylene/polyoxypropylene block polymer ethers.

As examples of amphoteric surfactants, mention may be made of imidazoline-type, amidobetaine-type, alkylbetaine-type, alkylamidobetaine-type, alkylsulfobetaine-type, amidosulfobetaine-type, hydroxysulfobetaine-type, carbobetaine-type, phosphobetaine-type, aminocarboxylic acid-type, and amidoamino acid-type amphoteric surfactants. More particularly, as examples thereof, mention may be made of imidazoline-type amphoteric surfactants such as sodium 2-undecyl-N,N,N-(hydroxyethylcarboxymethyl)-2-imidazoline, 2-cocoyl-2-imidazoliniumhydroxide-1-carboxyethyloxydisodium salt and the like; alkylbetaine-type amphoteric surfactants such as lauryl dimethylaminoacetic acid betaine, myristylbetaine and the like; and amidobetaine-type amphoteric surfactants such as coconut oil fatty acid amidopropyl dimethylamino acetic acid betaine, palm kernel oil fatty acid amidopropyl dimethylamino acetic acid betaine, beef tallow fatty acid amidopropyl dimethylamino acetic acid betaine, hardened beef tallow fatty acid amidopropyl dimethylamino acetic acid betaine, lauric amidopropyl dimethylamino acetic acid betaine, myristic amidopropyldimethylamino acetic acid betaine, palmitic amidopropyldimethylamino acetic acid betaine, stearic amidopropyl dimethylamino acetic acid betaine, oleic amidopropyl dimethylamino acetic acid betaine and the like; alkyl sulfobetaine-type amphoteric surfactants such as coconut oil fatty acid dimethyl sulfopropyl betaine and the like; alkylhydroxy sulfobetaine-type amphoteric surfactants such as lauryl dimethylaminohydroxy sulfobetaine and the like; phosphobetaine-type amphoteric surfactants such as laurylhydroxy phosphobetaine and the like; amidoamino acid-type amphoteric surfactants such as sodium N-lauroyl-N′-hydroxyethyl-N′-carboxymethyl ethylenediamine, sodium N-oleoyl-N′-hydroxyethyl-N′-carboxymethyl ethylenediamine, sodium N-cocoyl-N′-hydroxyethyl-N′-carboxymethyl ethylenediamine, potassium N-lauroyl-N′-hydroxyethyl-N′-carboxymethyl ethylenediamine, potassium N-oleoyl-N′-hydroxyethyl-N′-carboxymethyl ethylenediamine, sodium N-lauroyl-N-hydroxyethyl-N′-carboxymethyl ethylenediamine, sodium N-oleoyl-N-hydroxyethyl-N′-carboxymethyl ethylenediamine, sodium N-cocoyl-N-hydroxyethyl-N′-carboxymethyl ethylenediamine, monosodium N-lauroyl-N-hydroxyethyl-N′,N′-dicarboxymethyl ethylenediamine, monosodium N-oleoyl-N-hydroxyethyl-N′,N′-dicarboxymethyl ethylenediamine, monosodium N-cocoyl-N-hydroxyethyl-N′,N′-dicarboxymethyl ethylenediamine, disodium N-lauroyl-N-hydroxyethyl-N′, N′-dicarboxymethyl ethylenediamine, disodium N-oleoyl-N-hydroxyethyl-N′,N′-dicarboxymethyl ethylenediamine, disodium N-cocoyl-N-hydroxyethyl-N′,N′-dicarboxymethyl ethylenediamine and the like.

As examples of semi-polar surfactants, mention may be made of alkylamine oxide-type surfactants, alkylamine oxides, alkylamide amine oxides, alkylhydroxyamine oxides and the like. Alkyldimethylamine oxides having 10 to 18 carbon atoms, alkoxyethyl dihydroxyethylamine oxides having 8 to 18 carbon atoms and the like are preferably used. More particularly, as examples thereof, mention may be made of dodecyldimethylamine oxide, dimethyloctylamine oxide, diethyldecylamine oxide, bis-(2-hydroxyethyl) dodecylamine oxide, dipropyltetradecylamine oxide, methylethylhexadecylamine oxide, dodecylamidopropyldimethylamine oxide, cetyldimethylamine oxide, stearyldimethylamine oxide, tallow dimethylamine oxide, dimethyl-2-hydroxyoctadecylamine oxide, lauryldimethylamine oxide, myristyldimethylamine oxide, stearyldimethylamine oxide, isostearyldimethylamine oxide, coconut fatty acid alkyldimethylamine oxide, caprylic amide propyldimethylamine oxide, capric amide propyldimethylamine oxide, lauric amide propyldimethylamine oxide, myristic amide propyldimethylamine oxide, palmitic amide propyldimethylamine oxide, stearic amide propyldimethylamine oxide, isostearic amide propyldimethylamine oxide, oleic amide propyldimethylamine oxide, ricinoleic amide propyldimethylamine oxide, 12-hydroxystearic amide propyldimethylamine oxide, coconut fatty acid amide propyldimethylamine oxide, palm kernel oil fatty acid amide propyldimethylamine oxide, castor oil fatty acid amide propyldimethylamine oxide, lauric amide ethyldimethylamine oxide, myristic amide ethyldimethylamine oxide, coconut fatty acid amide ethyldimethylamine oxide, lauric amide ethyldiethylamine oxide, myristic amide ethyldiethylamine oxide, coconut fatty acid amide ethyldiethylamine oxide, lauric amide ethyldihydroxyethylamine oxide, myristic amide ethyldihydroxyethylamine oxide, and coconut fatty acid amide ethyldihydroxyethylamine oxide.

The cosmetics of the present invention can contain various cosmetic raw material(s), in addition to the aforementioned components. The aforementioned raw materials are preferably hydrophobic so that they are not dissolved in water at all or have a solubility below 1% by weight with respect to 100 g of water. As examples of the aforementioned cosmetic raw materials, mention may be made of, for example, powders, coloring agents, water-soluble polymers, oil-soluble gelling agents, organo-modified clay minerals, silicone gums, silicone resins, silicone elastomers, organo-modified silicones, UV-ray protective components and the like.

As the powders and/or coloring agents, those described above can be used. The powders and/or coloring agents can be at least one type of powders selected from inorganic powders, organic powders, and resin powders, having an average particle size ranging from 1 nm to 20 μm. At least one part of the aforementioned powders and/or coloring agents may be subjected to a water-repellent treatment with a surface-treatment agent other than that according to the present invention. As examples of the water-repellant treatments, mention may be made of organosiloxane treatments such as a methylhydrogenpolysiloxane treatment, a silicone resin treatment, a silicone gum treatment, an acryl silicone treatment, a fluorinated silicone treatment and the like; metallic soap treatments such as a zinc stearate treatment and the like; silane treatments such as a silane coupling agent treatment, an alkylsilane treatment and the like; fluorine compound treatments such as a perfluoroalkylsilane treatment, a perfluoroalkyl phosphate treatment, a perfluoro polyether treatment and the like; amino acid treatments such as an N-lauroyl-L-lysine treatment and the like; oil agent treatments such as a squalane treatment and the like; acryl treatments such as an alkyl acrylate treatment and the like. The aforementioned treatments can be used in combination of one or more types thereof.

As the water-soluble polymers, one type or two or more types thereof can be used. As examples of natural water-soluble polymers, mention may be made of vegetable-based polymers such as gum Arabic, tragacanth gum, galactan, guar gum, carob gum, Karaya gum, carrageenan, pectin, agar, quince seed, algal colloide, starch (rice, corn, potato, or wheat), glycyrrhizinic acid and the like; microorganism-based polymers such as xanthan gum, dextran, succinoglucan, pullulan, and the like; and animal-based polymers such as collagen, casein, albumin, gelatin, and the like. In addition, as examples of semi-synthetic water-soluble polymers, mention may be made of, for example, starch-based polymers such as carboxymethyl starch, methyhydroxypropyl starch, and the like; cellulose-based polymers such as methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, hydroxypropylcellulose, sodium carboxymethylcellulose (CMC), crystalline cellulose, cellulose powder, and the like; and alginate-based polymers such as sodium alginate, propylene glycol alginate and the like. As examples of synthetic water-soluble polymers, mention may be made of, for example, vinyl-based polymers such as polyvinyl alcohol, polyvinyl methyl ether-based polymer, polyvinylpyrrolidone, carboxyvinyl polymer (CARBOPOL 940, 941; manufactured by BF Goodrich Corporation) and the like; polyoxyethylene-based polymers such as polyethylene glycol 20,000, polyethylene glycol 6,000, polyethylene glycol 4,000 and the like; copolymer-based polymers such as a copolymer of polyoxyethylene and polyoxypropylene, PEG/PPG methyl ether and the like; acryl-based polymers such as poly(sodium acrylate), poly(ethyl acrylate), polyacrylamide and the like; polyethylene imines; cationic polymers and the like.

As examples of other cationic water-soluble polymers, in particular, as components which are preferably blended in hair cosmetics, mention may be made of quaternary nitrogen-modified polysaccharides such as cation-modified cellulose, cation-modified hydroxyethylcellulose, cation-modified guar gum, cation-modified locust bean gum, cation-modified starch and the like; dimethyldiallylammonium chloride derivatives such as a copolymer of dimethyldiallylammonium chloride and acrylamide, poly(dimethylmethylene piperidinium chloride) and the like; and vinylpyrrolidone derivatives such as a salt of a copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylic acid, a copolymer of vinylpyrrolidone and methacrylamide propyltrimethylammonium chloride, a copolymer of vinylpyrrolidone and methylvinylimidazolium chloride and the like.

As examples of oil-soluble gelling agents, mention may be made of metallic soaps such as aluminum stearate, magnesium stearate, zinc myristate and the like; amino acid derivatives such as N-lauroyl-L-glutamic acid, α, γ-di-n-butylamine and the like; dextrin fatty acid esters such as dextrin palmitate, dextrin stearate, dextrin 2-ethylhexanoate palmitate and the like; sucrose fatty acid esters such as sucrose palmitate, sucrose stearate and the like; benzylidene derivatives of sorbitol such as monobenzylidene sorbitol, dibenzylidene sorbitol and the like; and the like. The oil-soluble gelling agents can be used alone or in combination of two or more types thereof, if necessary.

As examples of organo-modified clay minerals, mention may be made of, for example, dimethylbenzyldodecylammonium montmorillonite clay, dimethyldioctadecylammonium montmorillonite clay, dimethylalkylammonium hectorite, benzyldimethylstearylammonium hectorite, distearyldimethylammonium chloride-treated aluminum magnesium silicate and the like. As examples of commercially available products thereof, mention may be made of Benton 27 (benzyldimethylstearylammonium chloride-treated hectorite, manufactured by Nationalred Co.), Benton 38 (distearyldimethylammonium chloride-treated hectorite, manufactured by Nationalred Co.) and the like.

The silicone gum is a linear diorganopolysiloxane having an ultra-high degree of polymerization, and is also referred to as a silicone raw rubber or an organopolysiloxane gum. The silicone raw rubber possesses a high degree of polymerization, and for this reason, it has a measurable degree of plasticity. In view of this, the silicone raw rubber is different from the aforementioned oil silicones. As examples of the aforementioned silicone raw rubber, mention may be made of substituted or non-substituted organopolysiloxanes having a dialkylsiloxy unit (D unit) such as dimethylpolysiloxane, methylphenylpolysiloxane, aminopolysiloxane, methylfluoroalkylpolysiloxane and the like, or those having a micro-crosslinking structure thereof and the like. As representative examples thereof, there are those represented by the following general formula: R¹⁰(CH₃)₂SiO{(CH₃)₂SiO}_(s){(CH₃)R¹¹SiO}_(t)Si(CH₃)₂R¹⁰ wherein R¹¹ is a group selected from a vinyl group, a phenyl group, an alkyl group having 6 to 20 carbon atoms, an aminoalkyl group having 3 to 15 carbon atoms, a perfluoroalkyl group having 3 to 15 carbon atoms, and a quaternary ammonium salt-containing alkyl group having 3 to 15 carbon atoms; the terminal R¹⁰ is a group selected from an alkyl group having 1 to 8 carbon atoms, a phenyl group, a vinyl group, an aminoalkyl group having 3 to 15 carbon atoms, a hydroxyl group and an alkoxy group having 1 to 8 carbon atoms; s=2,000 to 6,000; t=0 to 1,000; and s+t=2,000 to 6,000. Among these, a dimethylpolysiloxane raw rubber having a degree of polymerization ranging from 3,000 to 20,000 is preferred.

The silicone resin is an organopolysiloxane with a highly branched molecular structure, a net-like molecular structure or a cage-like molecular structure, and may be in the form of a liquid or solid at room temperature. Any silicone resins usually used in cosmetics can be used unless they are contrary to the purposes of the present invention.

As examples of the solid silicone resins, mention may be made of, for example, MQ resins, MDQ resins, MTQ resins, MDTQ resins, TD resins, TQ resins, or TDQ resins comprising any combinations of a triorganosiloxy unit (M unit) (wherein the organo group is a methyl group alone, or a methyl group in combination with a vinyl group or a phenyl group), a diorganosiloxy unit (D unit) (wherein the organo group is a methyl group alone, or a methyl group in combination with vinyl group or phenyl group), a monoorganosiloxy unit (T unit) (wherein the organo group is a methyl group, a vinyl group or a phenyl group), and a siloxy unit (Q unit). In addition, as other examples thereof, mention may be made of trimethylsiloxysilicic acid, polyalkylsiloxysilicic acid, trimethylsiloxysilicic acid containing dimethylsiloxy units and alkyl(perfluoroalkyl) siloxysilicic acid. The aforementioned silicone resins are preferably oil-soluble, and, in particular, preferably are soluble in D4 or D5.

A silicone elastomer in any form can be blended in the cosmetic in accordance with the purpose thereof. In particular, the silicone elastomer is preferably blended as organopolysiloxane elastomer powders or a crosslinking organopolysiloxane.

The silicone elastomer powders mainly correspond to a crosslinked product of a linear diorganopolysiloxane, and can be in various forms such as a spherical form, a flat form, an amorphous form and the like. The elastomer may be in the form of an oil dispersant without shapes. In the cosmetic of the present invention, silicone elastomer powders in the form of particles are preferred, which have a primary particle size observed by an electronic microscope and/or an average primary particle size, measured by a laser diffraction/scattering method, ranging from 0.1 to 50 μm, and in which the primary particle is preferably in the spherical form. In addition, the silicone elastomer constituting the silicone elastomer powder has a hardness preferably not exceeding 80, and more preferably not exceeding 65, when measured by means of a type A durometer according to JIS K 6253 “Method for determining hardness of vulcanized rubber or thermoplastic rubber”.

The organopolysiloxane elastomer spherical powders may be optionally subjected to a surface treatment with a silicone resin, a silica or the like. As examples of the aforementioned silicone elastomer powders, mention may be made of, for example, those described in Japanese Unexamined Patent Application, First Publication No. H02-243612; Japanese Unexamined Patent Application, First Publication No. H08-12545; Japanese Unexamined Patent Application, First Publication No. H08-12546; Japanese Unexamined Patent Application, First Publication No. H08-12524; Japanese Unexamined Patent Application, First Publication No. H09-241511; Japanese Unexamined Patent Application, First Publication No. H10-36219; Japanese Unexamined Patent Application, First Publication No. H11-193331; Japanese Unexamined Patent Application, First Publication No. 2000-281523 and the like. The crosslinking silicone powders listed in “Japanese Cosmetic Ingredients Codex (JCIC)” correspond thereto. As commercially available products of organopolysiloxane elastomer spherical powders, there are Trefil E-506S, Trefil E-508, 9701 Cosmetic Powder, and 9702 Powder, manufactured by Dow Corning Toray Co., Ltd., and the like. The aforementioned silicone elastomer powders may be subjected to a surface treatment. As examples of the surface treatment agents, mention may be made of methylhydrogenpolysiloxane, silicone resins, metallic soap, silane coupling agents, silica, inorganic oxides such as titanium oxide and the like and fluorine compounds such as perfluoroalkylsilane, perfluoroalkyl phosphoric ester salts and the like.

In addition, the organopolysiloxane elastomer spherical powders in the form of an aqueous dispersion can also be used in the cosmetic of the present invention. As examples of commercially available products of the aforementioned aqueous dispersion, mention may be made of, for example, “BY29-129” and “PF-2001 PIF Emulsion” manufactured by Dow Corning Toray Co., Ltd., and the like. By blending an aqueous dispersion (=suspension) of the aforementioned silicone elastomer powders, the sensation during use of the cosmetics of the present invention can be further improved, and from this point of view, the silicone elastomer powders are extremely useful.

As the crosslinking organopolysiloxanes, non-emulsifiable organopolysiloxanes without hydrophilic parts such as polyoxyalkylene units which have a three-dimensional crosslinked structure by a reaction between the organopolysiloxane chains and the crosslinking components and the like are preferred. The aforementioned crosslinking organopolysiloxanes can be used without restrictions of physical modes and preparation methods such as dilution, properties and the like. As particularly preferable examples thereof, mention may be made of α, ω-diene crosslinking silicone elastomers (as commercially available products, DC 9040 Silicone Elastomer Blend, DC 9041 Silicone Elastomer Blend, DC 9045 Silicone Elastomer Blend, and DC 9046 Silicone Elastomer Blend, manufactured by Dow Corning Corporation in the USA) described in U.S. Pat. No. 5,654,362.

The organo-modified silicones are preferably lipophilic. As examples thereof, mention may be made of amino-modified silicones, amino polyether-modified silicones, epoxy-modified silicones, carboxyl-modified silicones, amino acid-modified silicones, carbinol-modified silicones, acryl-modified silicones, phenol-modified silicones, amidoalkyl-modified silicones, aminoglycol-modified silicones, and alkoxy-modified silicones. The aforementioned organo-modified silicones may have an alkylene chain, an aminoalkylene chain or a polyether chain, in addition to the polysiloxane bonds as a main chain, with a degree such that the compound does not exhibit hydrophilic properties, and the organo-modified group may exist at the side chain or at one terminal or both terminals of the polysiloxane chain. In the case of using the cosmetics of the present invention as hair cosmetics, amino-modified silicones, carbinol-modified silicones, amino polyether-modified silicones, or amino glycol-modified silicones can be preferably used. As general examples thereof, amino-modified silicones having a 3-aminopropyl group, an N-(2-aminoethyl)-3-aminopropyl group and the like can be mentioned.

Among UV-ray protective components, there are inorganic UV-ray protective components and organic UV-ray protective components. If the cosmetics of the present invention are sunscreen cosmetics, at least one type of inorganic or organic UV-ray protective component, and in particular, an organic UV-ray protective component is preferably contained.

The inorganic UV-ray protective components may be components in which the aforementioned inorganic powder pigments, metal powder pigments and the like are blended as UV-ray dispersants. As examples thereof, mention may be made of metal oxides such as titanium oxide, zinc oxide, cerium oxide, titanium suboxide, iron-doped titanium oxides and the like; metal hydroxides such as iron hydroxides and the like; metal flakes such as platy iron oxide, aluminum flake and the like; and ceramics such as silicon carbide and the like. Among these, at least one type of a material selected from fine particulate metal oxides or fine particulate metal hydroxides with an average particle size ranging from 1 to 100 nm in the form of granules, plates, needles, or fibers is, in particular, preferred. The aforementioned powders are preferably subjected to conventional surface treatments such as fluorine compound treatments, among which a perfluoroalkyl phosphate treatment, a perfluoroalkylsilane treatment, a perfluoropolyether treatment, a fluorosilicone treatment, and a fluorinated silicone resin treatment are preferred; silicone treatments, among which a methylhydrogenpolysiloxane treatment, a dimethylpolysiloxane treatment, and a vapor-phase tetramethyltetrahydrogencyclotetrasiloxane treatment are preferred; silicone resin treatments, among which a trimethylsiloxysilicic acid treatment is preferred; pendant treatments which are methods of adding alkyl chains after the vapor-phase silicone treatment; silane coupling agent treatments; titanium coupling agent treatments; silane treatments among which an alkylsilane treatment and an alkylsilazane treatment are preferred; oil agent treatments; N-acylated lysine treatments; polyacrylic acid treatments; metallic soap treatments in which a stearic acid salt or a myristic acid salt is preferably used; acrylic resin treatments; metal oxide treatments and the like. A plurality of the treatments described above are preferably carried out. For example, the surface of the fine particulate titanium oxide is coated with a metal oxide such as silicon oxide, alumina or the like, and then, a surface treatment with an alkylsilane is carried out. The total amount of the material used for the surface treatment preferably ranges from 0.1 to 50% by weight based on the amount of the powder.

The organic UV-ray protective components are lipophilic UV-ray protective components. As examples thereof, mention may be made of benzoic acid-based UV-ray absorbers such as paraminobenzoic acid (hereinafter, referred to as PABA), PABA monoglycerol ester, N,N-dipropoxy-PABA ethyl ester, N,N-diethoxy-PABA ethyl ester, N,N-dimethyl-PABA ethyl ester, N,N-dimethyl-PABA butyl ester and the like; anthranilic acid-based UV-ray absorbers such as homomethyl N-acetylanthranilate and the like; salicylic acid-based UV-ray absorbers such as amyl salicylate, menthyl salicylate, homomethyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanolphenyl salicylate and the like; cinnamic acid-based UV-ray absorbers such as octyl cinnamate, ethyl 4-isopropylcinnamate, methyl 2,5-diisopropylcinnamate, ethyl 2,4-diisopropylcinnamate, methyl 2,4-diisopropylcinnamate, propyl p-methoxycinnamate, isopropyl p-methoxycinnamate, isoamyl p-methoxycinnamate, octyl p-methoxycinnamate (2-ethylhexyl p-methoxycinnamate), 2-ethoxyethyl p-methoxycinnamate, cyclohexyl p-methoxycinnamate, ethyl α-cyano-β-phenylcinnamate, 2-ethylhexyl α-cyano-β-phenylcinnamate, glyceryl mono-2-ethylhexanoyl-diparamethoxycinnamate, 3-methyl 4-[methylbis(trimethylsiloxy)silyl]butyl 3,4,5-trimethoxycinnamate and the like; benzophenone-based UV-ray absorbers such as 2,4-dihydroxybenzophenone, 2,2′-dihydroxy-4-methoxybenzophenone, 2,2′-dihydroxy-4,4′-dimethoxybenzophenone, 2,2′,4,4′-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4′-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone 5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4′-phenylbenzophenone 2-carboxylate, hydroxy-4-n-octoxybenzophenone, 4-hydroxy-3-carboxybenzophenone and the like; 3-(4′-methylbenzylidene)-d,l-camphor; 3-benzylidene-d,l-camphor; urocanic acid; ethyl urocanate; 2-phenyl-5-methylbenzoxazole; 2,2′-hydroxy-5-methylphenyl benzotriazole; 2-(2′-hydroxy-5′-t-octylphenyl)benzotriazole; 2-(2′-hydroxy-5′-methylphenyl)benzotriazole; dibenzaladine; dianisoylmethane; 4-methoxy-4′-t-butylbenzoylmethane; 5-(3,3-dimethyl-2-norbonylidene)-3-pentan-2-one and the like.

Furthermore, hydrophobic polymer powders containing the aforementioned organic UV-ray protective components inside thereof can also be used. The polymer powder may be hollow or not, may have an average primary particle size thereof ranging from 0.1 to 50 μm and may have a particle size distribution thereof of either broad or sharp. As examples of the polymers, mention may be made of acrylic resins, methacrylic resins, styrene resins, polyurethane resins, polyethylene, polypropylene, polyethylene terephthalate, silicone resins, nylons, acrylamide resins, and silylated polypeptide resins. Polymer powders containing the organic UV-ray protective components in an amount ranging from 0.1 to 30% by weight with respect to the amount of the powder are preferred. Polymer powders containing 4-tert-butyl-4′-methoxydibenzoylmethane, which is a UV-A absorber, are particularly preferred.

The UV-ray protective components which can be preferably used in the cosmetics of the present invention are at least one type of compound selected from the group consisting of fine particulate titanium oxide, fine particulate zinc oxide, 2-ethylhexyl paramethoxycinnamate, 4-tert-butyl-4′-methoxydibenzoylmethane, and benzophenone-based UV-ray absorbers. The aforementioned UV-ray protective components are commonly used and easily available, and exhibit superior effects of preventing ultraviolet rays. For these reasons, the aforementioned UV-ray protective components are preferably used. In particular, inorganic UV-ray protective components and organic UV-ray protective components are preferably used in combination. In addition, UV-A protective components and UV-B protective components are further preferably used in combination.

In the cosmetics of the present invention, other components usually used in cosmetics can be blended within a range which does not impair the effects of the present invention, such as alcohols, organic resins, humectants, preservatives, anti-microbial agents, perfumes, salts, antioxidants, pH adjustors, chelating agents, algefacient agents, anti-inflammatory agents, components for beautifying the skin (such as whitening agents, cell activators, agents for ameliorating skin roughness, blood circulation accelerators, astringents, antiseborrheic agents and the like), vitamins, amino acids, nucleic acids, hormones, clathrate compounds and the like. They are not particularly restricted thereto.

As the alcohols, one type or two or more types of polyhydric alcohols and/or lower monovalent alcohols can be used. As examples of lower alcohols, mention may be made of ethanol, isopropanol, n-propanol, t-butanol, s-butanol and the like. As examples of polyhydric alcohols, mention may be made of divalent alcohols such as 1,3-butylene glycol, 1,2-butylene glycol, propylene glycol, trimethylene glycol, tetramethylene glycol, 2,3-butylene glycol, pentamethylene glycol, 2-butene-1,4-diol, dibutylene glycol, pentyl glycol, hexylene glycol, octylene glycol and the like; trivalent alcohols such as glycerol, trimethylolpropane, 1,2,6-hexanetriol and the like; polyhydric alcohols having tetra- or more valences such as pentaerythritol, xylitol and the like; sugar alcohols such as sorbitol, mannitol, maltitol, maltotriose, sucrose, erytritol, glucose, fructose, starch decomposed products, maltose, xylitose, starch decomposed reduction alcohols and the like. In addition to the aforementioned polyhydric alcohols having a low molecular weight, mention may be made of polyhydric alcohol polymers such as diethylene glycol, dipropylene glycol, triethylene glycol, polypropylene glycol, tetraethylene glycol, diglycerol, polyethylene glycol, triglycerol, tetraglycerol, polyglycerol and the like. Among these, 1,3-butylene glycol, sorbitol, dipropylene glycol, glycerol, and polyethylene glycol are, in particular, preferred. The blending amount thereof preferably ranges from 0.1 to 50% by weight with respect to the total amount of the cosmetic.

As examples of organic resins, mention may be made of polyvinyl alcohol, polyvinylpyrrolidone, poly(alkyl acrylate) copolymer and the like.

As examples of humectants, mention may be made of, for example, hyaluronic acid, chondroitin sulfate, pyrrolidone carboxylic acid salts, polyoxyethylene methylglucoside, polyoxypropylene methylglucoside, and the like. Needless to say, the aforementioned polyhydric alcohols exhibit a function of retaining moisture on the skin or hair.

As examples of the preservatives, mention may be made of, for example, alkyl paraoxybenzoates, benzoic acid, sodium benzoate, sorbic acid, potassium sorbate, phenoxyethanol and the like. As examples of the antimicrobial agents, mention may be made of benzoic acid, salicylic acid, carbolic acid, sorbic acid, alkyl paraoxybenzoates, parachloromethacresol, hexachlorophene, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, trichlosan, photosensitizers and the like. In the case of lipsticks, the aforementioned compounds are not preferably contained.

As examples of perfumes, mention may be made of perfumes extracted from flowers, seeds, leaves, and roots of various plants; perfumes extracted from seaweeds; perfumes extracted from various parts or secretion glands of animals such as musk and sperm oil; or artificially synthesized perfumes such as menthol, musk, ethyl acetate, and vanilla. The perfumes are blended in the cosmetics in order to impart the cosmetics with a certain aroma or scent, or in order to mask unpleasant odor.

As examples of antioxidants, mention may be made of, for example, tocopherol, butylhydroxyanisole, dibutylhydroxytoluene, phytic acid and the like.

As examples of pH adjustors, mention may be made of, for example, lactic acid, citric acid, glycolic acid, succinic acid, tartaric acid, dl-malic acid, potassium carbonate, sodium hydrogencarbonate, ammonium hydrogencarbonate and the like.

As examples of chelating agents, mention may be made of, for example, alanine, sodium salt of edetic acid, sodium polyphosphate, sodium metaphosphate, phosphoric acid and the like.

As examples of algefacient agents, mention may be made of l-menthol, camphor and the like.

As examples of anti-inflammatory agents, mention may be made of ε-aminocaproic acid, glycyrrhizinic acid, β-glycyrrhetinic acid, lysozyme chloride, guaiazulene, hydrocortisone, allantoin, tranexamic acid, azulene and the like

As examples of skin-beautifying components, mention may be made of whitening agents such as placenta extracts, arbutin, glutathione, saxifrageous extracts and the like; cell activators such as royal jelly, and the like; agents for ameliorating skin roughness; blood circulation accelerators such as nonylic acid vanillylamide, benzyl nicotinate, beta-butoxyethyl nicotinate, capsaicin, gingerone, cantharide tincture, ichthammol, caffeine, tannic acid, alpha-borneol, tocopherol nicotinate, inositol hexanicotinate, cyclandelate, cinnarizine, tolazoline, acetylcholine, verapamil, cepharanthine, gamma-orizanol and the like; astringents such as zinc oxide, tannic acid and the like; antiseborrheic agents such as sulfur, thianthol and the like; and the like.

As examples of vitamins, mention may be made of vitamin As such as vitamin A oil, retinol, retinol acetate, retinol palmitate and the like; vitamin Bs such as vitamin B2s such as riboflavin, riboflavin butyrate, flavin adenine dinucleotide and the like; vitamin B6s such as pyridoxine hydrochloride, pyridoxine dioctanoate, pyridoxine tripalmitate and the like; vitamin B12 and derivatives thereof; vitamin B15 and derivatives thereof, and the like; vitamin Cs such as L-ascorbic acid, L-ascorbyl dipalmitic acid esters, sodium L-ascorbyl 2-sulfate, dipotassium L-ascorbyl phosphoric acid diester and the like; vitamin Ds such as ergocalciferol, cholecalciferol and the like; vitamin Es such as alpha-tocopherol, beta-tocopherol, gamma-tocopherol, dl-alpha-tocopherol acetate, dl-alpha-tocopherol nicotinate, dl-alpha-tocopherol succinate and the like; vitamin H; vitamin P; nicotinic acids such as nicotinic acid, benzyl nicotinate and the like; pantothenic acids such as calcium pantothenate, D-pantothenyl alcohol, pantothenyl ethyl ether, acetyl pantothenyl ethyl ether and the like; and the like.

As examples of amino acids, mention may be made of glycine, valine, leucine, isoleucine, serine, threonine, phenylalanine, arginine, lysine, aspartic acid, glutamate, cystine, cysteine, methionine, tryptophan and the like.

As examples of nucleic acids, mention may be made of deoxyribonucleic acid and the like.

As examples of hormones, mention may be made of estradiol, ethenyl estradiol and the like.

In the cosmetics of the present invention, natural vegetable extract components, seaweed extract components and herbal medicine components can be blended in accordance with the purposes thereof. The aforementioned components can be blended in combination of two or more types thereof.

As detailed examples thereof, mention may be made of, for example, Angelica keiskei extract, avocado extract, Hydrangea serrata extract, Althaea officinalis extract, Arnica montana extract, aloe extract, apricot extract, apricot kernel extract, Gingko biloba extract, fennel fruit extract, turmeric root extract, oolong tea extract, Rosa multiflora extract, Echinacea angustifolia leaf extract, Scutellaria baicalensis root Extract, Phellodendron amurense bark extract, Coptis rhizome extract, Hordeum vulgare seed extract, Hypericum perforatum extract, Lamium album extract, Nasturtium officinale extract, orange extract, dried sea water solution, seaweed extract, hydrolyzed elastin, hydrolyzed wheat powders, hydrolyzed silk, Chamomilla recutita extract, carrot extract, Artemisia capillaris flower extract, Glycyrrhiza glabra extract, Hibiscus sabdariffa extract, Pyracantha fortuneana extract, kiwi extract, Cinchona succirubra extract, cucumber extract, guanosine, Gardenia florida extact, Sasa veitchii extract, Sophora angustifolia extract, walnut extract, grapefruit extract, Clematis vitalba leaf extract, chlorella extract, Morus alba extract, Gentiana lutea extract, black tea extract, yeast extract, burdock extract, fermented rice bran extract, rice germ oil, Symphytum officinale leaf extract, collagen, Vaccinum vitis idaea extract, Asiasarum sieboldi extract, Bupleurum falcatum extract, umbilical extract, Salvia extract, Crocus sativus flower extract, sasa bamboo grass extract, Crataegus cuneata fruit extract, Zanthoxylum piperitum extract, Corthellus shiitake extract, Rehmannia chinensis root extract, Lithospermum erythrorhizone root extract, Perilla ocymoides extract, Tilia cordata extract, Spiraea ulmaria extract, Paeonia albiflora extract, Acorns calamus root extract, Betula alba extract, Equisetum arvense extract, Hedera helix extract, Crataegus oxyacantha extract, Sambucus nigra extract, Achilleamillefolium extract, Mentha piperita leaf extract, sage extract, Malva sylvestris extract, Cnidium officinale root extract, Swertia japonica extract, soybean seed extract, Zizyphus jujuba fruit extract, thyme extract, Camellia sinensis leaf extract, Eugenia caryophyllus flower extract, Imperata cylindrica extract, Citrus unshiu peel extract, Angelica acutiloba root extract, Calendula officinalis extract, Prunus persica kernel extract, Citrus aurantium peel extract, Houttuynia cordata extract, tomato extract, natto extract, carrot extract, garlic extract, Rosa canina fruit extract, hibiscus extract, Ophiopogon japonicus root extract, Nelumbo nucifera extract, parsley extract, honey, Hamamelis virginiana extract, Parietaria officinalis extract, Isodon trichocarpus extract, bisabolol, Eriobotrya japonica extract, Tussilago farfara flower extract, Petasites japonicus extract, Poria cocos extract, Ruscus aculeatus root extract, grape extract, propolis, Luffa cylindrica fruit extract, safflower flower extract, peppermint extract, Tillia miquellana extract, Paeonia suffruticosa root extract, Humulus lupulus extract, Pinus sylvestris cone extract, horse chestnut extract, Lysichiton camtschatcense extract, Sapindus mukurossi peel extract, Melissa officinalis leaf extract, peach extract, Centaurea cyanus flower extract, Eucalyptus globulus leaf extract, Saxifraga sarementosa extract, Citrus junos extract, Coix lacryma-jobi seed extract, Artemisia princeps extract, lavender extract, apple extract, lettuce extract, lemon extract, Astragalus sinicus extract, rose extract, rosemary extract, Roman chamomile extract, and royal jelly extract. Those which are lipophilic are particularly preferred.

In the cosmetics of the present invention, depending on the purposes thereof, solvents such as light isoparaffins, ethers, LPG, N-methylpyrrolidone, next-generation chlorofluorocarbons, and the like, can be blended in addition to water such as purified water, mineral water and the like.

In addition, in the cosmetic of the present invention, at least one material selected from the group consisting of acrylsilicone dendrimer copolymers, polyamide-modified silicones, alkyl-modified silicone waxes and alkyl-modified silicone resin waxes can be used, in addition to the copolymer of the present invention.

As particularly preferable examples of the acrylsilicone dendrimer copolymers, mention may be made of, for example, a vinyl-based polymer having a carbosiloxane dendrimer structure at the side chain, which is described in Japanese Patent No. 4009382 (Japanese Unexamined Patent Application, First Publication No. 2000-063225). As examples of commercially available products, mention may be made of FA 4001 CM Silicone Acrylate, and FA 4002 ID Silicone Acrylate (manufactured by Dow Corning Toray Co., Ltd.) and the like.

As examples of the polyamide-modified silicones, mention may be made of, for example, siloxane-based polyamides described in U.S. Pat. No. 5,981,680. As examples of commercially available products, mention may be made of 2-8178 Gellant, and 2-8179 Gellant (manufactured by Dow Corning Corporation, in the USA) and the like.

As examples of the alkyl-modified silicone waxes which may be an alkyl-modified silicone in the form of a wax at room temperature, mention may be made of, for example, a methyl(long-chain alkyl)polysiloxane of which both molecular terminals are capped with trimethylsiloxy groups, a copolymer of a methyl(long-chain alkyl)siloxane and a dimethylpolysiloxane of which both molecular terminals are capped with trimethylsiloxy groups, a both-terminal (long-chain alkyl)-modified dimethylpolysiloxane and the like. As examples of the commercially available products thereof, mention may be made of AMS-C30 Cosmetic Wax, and 2503 Cosmetic Wax (manufactured by Dow Corning Corporation, in the USA) and the like.

As preferable examples of the alkyl-modified silicone resin waxes, mention may be made of, for example, silsesquioxane resin waxes described in Published Japanese Translation No. 2007-532754 of the PCT International Application.

The cosmetics of the present invention can be in the form of liquids, milky lotions, creams, solids, pastes, gels, powders, lamellas, mousses, sprays and the like. As examples of the cosmetics of the present invention, mention may be made of, for example, UV-ray protective products such as sunscreen agents and the like; skin care products such as cosmetic lotions, cosmetic milks, creams, cleansing products, products for use in massaging, cleansing agents and the like; makeup products such as foundations, makeup bases, cheek colors, eye shadows, mascaras, eyeliners, lipsticks and the like; products for use on hair such as shampoos, rinses, treatments and the like; antiperspirant products; deodorant products and the like.

EXAMPLES

Hereinafter, the present invention is described in detail with reference to examples and comparative examples. It should be understood that the present invention is not restricted to the examples. In the following description, “%” and “parts” mean “% by weight” and “parts by weight”, respectively.

Synthesis Example 1

100 g of toluene was placed in a four-necked flask with a volume of 300 mL, equipped with a stirrer, a thermometer and a reflux condenser, and bubbling with nitrogen gas was carried out to sufficiently deaerate, followed by heating to 100° C. 36 g of methyl methacrylate, 14 g of n-butyl acrylate, 40 g of a carbosiloxane dendrimer monomer represented by the following formula (A):

10 g of methacryloxypropyltriethoxysilane, and 1.0 g of 2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka Pharmaceutical Co., Ltd.) were placed in a dropping funnel, and they were dissolved. The monomer mixture was added dropwise to the flask which was maintained at 100° C. from the dropping funnel over 2 hours under a nitrogen atmosphere. After completion of the dropwise addition, the mixture was heated and stirred for 6 hours under a nitrogen atmosphere. The reaction product after stirring was subjected to analysis of the polymerization addition rate by means of gas chromatography. As a result, the addition rate of polymerization was 97%, and it was confirmed that a vinyl-based polymer was obtained. Toluene was added to the aforementioned vinyl-based polymer so as to adjust the solid content to 40%. The weight average molecular weight thereof on the basis of polystyrene standard by means of GPC was 30,000.

Synthesis Example 2

100 g of toluene was placed in a four-necked flask with a volume of 300 mL, equipped with a stirrer, a thermometer and a reflux condenser, and bubbling with nitrogen gas was carried out to sufficiently deaerate, followed by heating to 100° C. 31 g of methyl methacrylate, 40 g of the carbosiloxane dendrimer monomer represented by the aforementioned formula (A), 24 g of 2-ethylhexyl acrylate, 5 g of methacryloxypropyltriethoxysilane, and 1.0 g of 2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka Pharmaceutical Co., Ltd.) were placed in a dropping funnel, and they were dissolved. The monomer mixture was added dropwise to the flask which was maintained at 100° C. from the dropping funnel over 2 hours under a nitrogen atmosphere. After completion of the dropwise addition, the mixture was heated and stirred for 6 hours under a nitrogen atmosphere. The reaction product after stirring was subjected to analysis of the polymerization addition rate by means of gas chromatography. As a result, the addition rate of polymerization was 97%, and it was confirmed that a vinyl-based polymer was obtained. Toluene was added to the aforementioned vinyl-based polymer so as to adjust the solid content to 40%. The weight average molecular weight thereof on the basis of polystyrene standard by means of GPC was 26,000.

Synthesis Example 3

100 g of toluene was placed in a four-necked flask with a volume of 300 mL, equipped with a stirrer, a thermometer and a reflux condenser, and bubbling with nitrogen gas was carried out to sufficiently deaerate, followed by heating to 100° C. 20 g of methyl methacrylate, 30 g of stearyl methacrylate, 5 g of n-butyl acrylate, 40 g of the carbosiloxane dendrimer monomer represented by the aforementioned formula (A), 5 g of methacryloxypropyltriethoxysilane, and 1.0 g of 2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka Pharmaceutical Co., Ltd.) were placed in a dropping funnel, and they were dissolved. The monomer mixture was added dropwise to the flask which was maintained at 100° C. from the dropping funnel over 2 hours under a nitrogen atmosphere. After completion of the dropwise addition, the mixture was heated and stirred for 6 hours under a nitrogen atmosphere. The reaction product after stirring was subjected to analysis of the polymerization addition rate by means of gas chromatography. As a result, the addition rate of polymerization was 97%, and it was confirmed that a vinyl-based polymer was obtained. Toluene was added to the aforementioned vinyl-based polymer so as to adjust the solid content to 40%. The weight average molecular weight thereof on the basis of polystyrene standard by means of GPC was 26,000.

Synthesis Example 4

100 g of toluene was placed in a four-necked flask with a volume of 300 mL, equipped with a stirrer, a thermometer and a reflux condenser, and bubbling with nitrogen gas was carried out to sufficiently deaerate, followed by heating to 100° C. 15 g of methyl methacrylate, 30 g of trifluoroethyl methacrylate, 10 g of n-butyl acrylate, 40 g of the carbosiloxane dendrimer monomer represented by the aforementioned formula (A), 5 g of methacryloxypropyltriethoxysilane, and 1.0 g of 2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka Pharmaceutical Co., Ltd.) were placed in a dropping funnel, and they were dissolved. The monomer mixture was added dropwise to the flask which was maintained at 100° C. from the dropping funnel over 2 hours under a nitrogen atmosphere. After completion of the dropwise addition, the mixture was heated and stirred for 6 hours under a nitrogen atmosphere. The reaction product after stirring was subjected to analysis of the polymerization addition rate by means of gas chromatography. As a result, the addition rate of polymerization was 97%, and it was confirmed that a vinyl-based polymer was obtained. Toluene was added to the aforementioned vinyl-based polymer so as to adjust the solid content to 40%. The weight average molecular weight thereof on the basis of polystyrene standard by means of GPC was 22,000.

Synthesis Example 5

100 g of toluene was placed in a four-necked flask with a volume of 300 mL, equipped with a stirrer, a thermometer and a reflux condenser, and bubbling with nitrogen gas was carried out to sufficiently deaerate, followed by heating to 100° C. 38 g of methyl methacrylate, 12 g of n-butyl acrylate, 40 g of the carbosiloxane dendrimer monomer represented by the aforementioned formula (A), 10 g of methacryloxypropyltriethoxysilane, and 1.0 g of 2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka Pharmaceutical Co., Ltd.) were placed in a dropping funnel, and they were dissolved. The monomer mixture was added dropwise to the flask which was maintained at 100° C. from the dropping funnel over 2 hours under a nitrogen atmosphere. After completion of the dropwise addition, the mixture was heated and stirred for 6 hours under a nitrogen atmosphere. The reaction product after stirring was subjected to analysis of the polymerization addition rate by means of gas chromatography. As a result, the addition rate of polymerization was 97%, and it was confirmed that a vinyl-based polymer was obtained. Toluene was added to the aforementioned vinyl-based polymer so as to adjust the solid content to 40%. The weight average molecular weight thereof on the basis of polystyrene standard by means of GPC was 35,000.

Synthesis Example 6

100 g of toluene was placed in a four-necked flask with a volume of 300 mL, equipped with a stirrer, a thermometer and a reflux condenser, and bubbling with nitrogen gas was carried out to sufficiently deaerate, followed by heating to 100° C. 31 g of methyl methacrylate, 9 g of n-butyl acrylate, 50 g of the carbosiloxane dendrimer monomer represented by the aforementioned formula (A), 10 g of methacryloxypropyltrimethoxysilane, and 1.0 g of 2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka Pharmaceutical Co., Ltd.) were placed in a dropping funnel, and they were dissolved. The monomer mixture was added dropwise to the flask which was maintained at 100° C. from the dropping funnel over 2 hours under a nitrogen atmosphere. After completion of the dropwise addition, the mixture was heated and stirred for 6 hours under a nitrogen atmosphere. The reaction product after stirring was subjected to analysis of the polymerization addition rate by means of gas chromatography. As a result, the addition rate of polymerization was 97%, and it was confirmed that a vinyl-based polymer was obtained. Toluene was added to the aforementioned vinyl-based polymer so as to adjust the solid content to 40%. The weight average molecular weight thereof on the basis of polystyrene standard by means of GPC was 20,000.

Synthesis Example 7

100 g of toluene was placed in a four-necked flask with a volume of 300 mL, equipped with a stirrer, a thermometer and a reflux condenser, and bubbling with nitrogen gas was carried out to sufficiently deaerate, followed by heating to 100° C. 50 g of methyl methacrylate, 10 g of n-butyl acrylate, 40 g of the carbosiloxane dendrimer monomer represented by the aforementioned formula (A), and 1.0 g of 2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka Pharmaceutical Co., Ltd.) were placed in a dropping funnel, and they were dissolved. The monomer mixture was added dropwise to the flask which was maintained at 100° C. from the dropping funnel over 2 hours under a nitrogen atmosphere. After completion of the dropwise addition, the mixture was heated and stirred for 6 hours under a nitrogen atmosphere. The reaction product after stirring was subjected to analysis of the polymerization addition rate by means of gas chromatography. As a result, the addition rate of polymerization was 97%, and it was confirmed that a vinyl-based polymer was obtained. Toluene was added to the aforementioned vinyl-based polymer so as to adjust the solid content to 40%. The weight average molecular weight thereof on the basis of polystyrene standard by means of GPC was 45,000.

Synthesis Example 8

100 g of toluene was placed in a four-necked flask with a volume of 300 mL, equipped with a stirrer, a thermometer and a reflux condenser, and bubbling with nitrogen gas was carried out to sufficiently deaerate, followed by heating to 100° C. 27 g of methyl methacrylate, 8 g of n-butyl acrylate, 45 g of the carbosiloxane dendrimer monomer represented by the aforementioned formula (A), 20 g of stearyl methacrylate, and 1.0 g of 2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka Pharmaceutical Co., Ltd.) were placed in a dropping funnel, and they were dissolved. The monomer mixture was added dropwise to the flask which was maintained at 100° C. from the dropping funnel over 2 hours under a nitrogen atmosphere. After completion of the dropwise addition, the mixture was heated and stirred for 6 hours under a nitrogen atmosphere. The reaction product after stirring was subjected to analysis of the polymerization addition rate by means of gas chromatography. As a result, the addition rate of polymerization was 97%, and it was confirmed that a vinyl-based polymer was obtained. Toluene was added to the aforementioned vinyl-based polymer so as to adjust the solid content to 40%. The weight average molecular weight thereof on the basis of polystyrene standard by, means of GPC was 19,000.

Comparative Synthesis Example 1

100 g of toluene was placed in a four-necked flask with a volume of 500 mL, equipped with a stirrer, a thermometer and a reflux condenser, and bubbling with nitrogen gas was carried out to sufficiently deaerate, followed by heating to 100° C. 41 g of methyl methacrylate, 14 g of n-butyl acrylate, 40 g of a methacryl-modified silicone monomer (pentacosamer) represented by the following formula:

5 g of methacryloxypropyltrimethoxysilane, and 1.0 g of 2,2′-azobis-2-methylbutyronitrile (manufactured by Otsuka Pharmaceutical Co., Ltd.) were placed in a dropping funnel, and they were dissolved. The monomer mixture was added dropwise to the flask which was maintained at 80° C. from the dropping funnel over 2 hours under a nitrogen atmosphere. After completion of the dropwise addition, the mixture was heated and stirred for 6 hours under a nitrogen atmosphere. The reaction product after stirring was subjected to analysis of the polymerization addition rate by means of gas chromatography. As a result, the addition rate of polymerization was 98%, and it was confirmed that a vinyl-based polymer was obtained. Toluene was added to the aforementioned vinyl-based polymer so as to adjust the solid content to 40%. The weight average molecular weight thereof on the basis of polystyrene standard by means of GPC was 42,000.

Examples 1 to 8 and Comparative Examples 1 and 2

A solution obtained by mixing 1.25 g of a 40% solution of the surface-treatment agent produced in Synthesis Example 1 and 5 g of toluene was added to 25 g of untreated titanium oxide (CR-50, manufactured by Ishihara Sangyo Kaisha Ltd.) which had been pre-pulverized by means of a pulverizer, and the mixture was stirred. After stirring, the toluene was removed by drying in an oven at 150° C., and the mixture was subjected to a baking treatment. Subsequently, the baked product was pulverized by means of a pulverizer. Thereby, treated powders of Example 1, which were treated with 2% of the carbosiloxane dendrimer, were obtained.

In the same manner as described above, surface-treated powders (2%) in accordance with Examples 2 to 8 and Comparative Example 1 were obtained by using Synthesis Examples 2 to 8 and Comparative Synthesis Example 1, respectively. In addition, as Comparative Example 2, comparative surface-treated powders were obtained by subjecting the same type of untreated titanium oxide as described above to a surface treatment with 2% of methylhydrogenpolysiloxane.

Evaluation 1

Properties of water resistance, the stability over time and hydrogen-generating properties of the surface-treated powders according to Examples 1 to 8 and Comparative Examples 1 and 2 were evaluated as described below. The results are shown in Table 1.

Water Resistance

A specified amount of the surface-treated powders was pressed, and a water droplet was mounted on the surface thereof. The contact angle with respect to water droplet was measured by means of a contact angle meter. As the measurement apparatus, an automatic contact angle meter (manufactured by Kyowa Interface Science Co., Ltd.) was used.

Stability Over Time

A mixture of 10 g of ethanol and 40 g of ion-exchanged water was placed in a glass bottle, and 0.5 g of the surface-treated powder was added thereto. The bottle was allowed to stand in an oven at 50° C. Whether or not the surface-treated powders settled out was evaluated by visual confirmation. The composition in which no sedimentation was observed for one or more months at 50° C. was evaluated as ◯◯, the composition in which sedimentation was partially observed for one month at 50° C. was evaluated as ◯, and the composition in which complete sedimentation was observed for one month at 50° C. was evaluated as Δ.

Hydrogen-Generating Properties

A solution composed of potassium hydroxide, water and ethanol was added to a dispersion in which the surface-treated powders were dispersed in decamethylpentacyclosiloxane (D5), and whether or not hydrogen generated was confirmed. The composition in which no hydrogen generated was evaluated as ◯◯ and the composition in which hydrogen generated was evaluated as X.

TABLE 1 Ex. Ex. Ex. Ex. Ex. Ex. Ex. Ex. Comp. Comp. 1 2 3 4 5 6 7 8 Ex. 1 Ex. 2 Contact 151 146 142 152 149 147 142 140 137 145 angle of water Stability ◯◯ ◯ ◯ ◯ ◯◯ ◯◯ Δ ◯ ◯ ◯◯ over time Hydrogen ◯◯ ◯◯ ◯◯ ◯◯ ◯◯ ◯◯ ◯◯ ◯◯ ◯◯ X generating properties

As shown in Table 1, it can be seen that the surface-treated powders according to Examples 1 to 8 exhibit superior water resistance and superior stability over time, as compared with the surface-treated powders according to Comparative Examples 1 and 2, and generate no hydrogen over time. Therefore, it is confirmed that the surface-treated powders of the present invention are extremely superior as raw materials for use in cosmetics.

Evaluation 2

A solution obtained by mixing 2 g of the 40% solution of the surface treatment agent produced in each of Synthesis Examples 3 and 6 and Comparative Synthesis Example 1 and 30 g of toluene was added to 40 g of untreated titanium oxide fine powder (MT-500B, manufactured by Tayca Corporation), and the mixture was stirred. Subsequently, toluene was removed by drying in an oven at 150° C., and a baking treatment was carried out thereon. Subsequently, 37 g of decamethylpentacyclosiloxane (D5), 30 g of the dried powders, 300 g of zirconia beads and 7.1 g of polyether-modified silicone (SS2910, manufactured by Dow Corning Toray Co., Ltd.) were pulverized and dispersed for 2 hours by means of a paint shaker. Thereby, a slurry of titanium oxide treated with 2% of acryl dendrimer was obtained. In addition, as Comparative Example 2, the same type of untreated titanium oxide as described above was surface-treated with 2% of methylhydrogenpolysiloxane, and a slurry of titanium oxide having the same composition as described above using the aforementioned surface-treated powders was prepared.

The rheology measurement of each of the aforementioned slurries of titanium oxide was carried out using the following device under the following conditions. The results are shown in FIG. 1.

Measurement device: AR1000-N cone-plate type viscometer manufactured by TA Instruments

Measurement conditions: 40 mm 1° geometry made of steel, shearing rate=0.01 to 1,000 s⁻¹ at 25° C.

As shown in FIG. 1, it can be seen that when the surface-treatment agents according to Synthesis Examples 3 and 6 are used, the viscosity of the slurry is reduced and a slurry with superior feeling on touch can be provided, as compared with the case of using the surface-treatment agent of Comparative Synthesis Example 1, or as compared with the case of using the surface-treatment agent of Comparative Synthesis Example 2, even if the same dispersion conditions are used.

Evaluation 3

The treatment efficiency, was evaluated using the aforementioned treated powders according to Examples 1 and 7. The treated titanium oxide according to each of Examples 1 and 7 was stirred and washed with an excess amount of toluene for one hour. Subsequently, the mixture was subjected to centrifugal separation, and the supernatant toluene and unreacted powder-treatment were extracted. The aforementioned operation was repeated three times, and toluene was removed by drying. Subsequently, the contact angle of water with the treated powder was measured. The results are shown in Table 2.

TABLE 2 Contact angle of Contact angle of water before washing water after washing Sample with toluene with toluene Example 1 151 degrees 151 degrees (containing an alkoxysilyl group) Example 7 142 degrees 110 degrees (containing no alkoxysilyl group)

From the aforementioned experiments, it can be seen that containing an alkoxysilyl group in a powder-treatment agent is effective in order to extend the duration of water repellency.

Hereinafter, composition examples and preparation examples of cosmetic of the present invention are described in detail.

Composition Example 1

Oil-in-water cosmetic (Components) (parts(s))  (1) Stearic acid 2.5  (2) Glyceryl stearate 1.9  (3) Cetostearyl alcohol 0.4  (4) Behenyl alcohol 0.1  (5) Liquid paraffin 9.9  (6) Propylene glycol 9  (7) Xanthan gum 0.5  (8) Cellulose gum 0.5  (9) Hectorite 0.5 (10) Triethanolamine 1.2 (11) Methylparaben 0.1 (12) Purified water 63.3 (13) Titanium oxide treated with 8.6 Synthesis Example 1 (14) Yellow iron oxide treated with 1 Synthesis Example 1 (15) Red iron oxide treated with 0.3 Synthesis Example 1 (16) Black iron oxide treated with 0.2 Synthesis Example 1

Preparation Method

-   1. Components 1 to 5 are heated and dissolved. -   2. Components 13 to 16 are added to the oil phase obtained in step 1     and are uniformly dispersed by means of a homomixer. -   3. Components 6 to 12 are uniformly heated and mixed. -   4. The aqueous phase obtained in step 3 is added to the oil phase     obtained in step 2, and the mixture is stirred and emulsified by     means of a homomixer.

Composition Example 2

Powder foundation (Components) (part(s))  (1) Talc treated with 32 Synthesis Example 6  (2) Mica 27  (3) Zinc oxide treated with an alkylsilane 2  (4) Titanium oxide treated with a silicone 10  (5) Yellow iron oxide treated with a silicone 2.5  (6) Red iron oxide treated with a silicone 1  (7) Black iron oxide treated with a silicone 0.3  (8) Barium sulfate 5  (9) Polymethylmethacrylate 1 (10) Dimethicone/vinyldimethicone 1 crosspolymer/silica (Note 1) (11) Cyclopentasiloxane, dimethicone 8 crosspolymer (Note 2) (12) Ethylhexyl methoxycinnamate 1 (13) Squalane 2.5 (14) Phenylmethylsilicone 2 (15) Diisostearyl malate 3 (16) Polyether-modified silicone (Note 3) 1.5 (17) Paraben 0.2 (Note 1) DC9701 manufactured by Dow Corning Toray Co., Ltd. (Note 2) DC9045 manufactured by Dow Corning Corporation (Note 3) SS-2910 manufactured by Dow Corning Toray Co., Ltd.

Preparation Method

-   1. Components 10 to 17 are mixed and dissolved. -   2. Components 1 to 9 are mixed. -   3. The mixture obtained in step 2 is added to the mixture obtained     in step 1, and the mixture is stirred and kneaded, and then     pulverized. -   4. The pulverized product obtained in step 3 is press-molded in a     metal mold, and thereby, a solid powder foundation is obtained.

Composition Example 3

Liquid foundation (Components) (part(s)) Phase A  (1) Dextrin palmitate 2.1  (2) Glyceryl tricaprylate, glyceryl caprate 5  (3) PEG/PPG-18/18 dimethicone (Note 1) 10  (4) PEG-12 dimethicone (Note 2) 1.9 Phase B  (5) Cyclopentasiloxane 8  (6) Dimethicone (2 cs) 5  (7) Phenyltrimethicone 5  (8) Tristrimethylsiloxysilane 2  (9) Iron oxide treated with 3.5 Synthesis Example 2 (2% treated) (10) Mica treated with 3.5 Synthesis Example 2 (2% treated) (11) Cyclopentasiloxane/(acrylates/ 3 polytrimethylsiloxymethacrylate copolymer) (Note 3) (12) Cyclopentasiloxane, 2 Dimethicone crosspolymer (Note 4) Phase C (13) Purified water 48 (14) Sodium chloride 1 (Note 1) DC5225C manufactured by Dow Corning Corporation (Note 2) DC193C manufactured by Dow Corning Corporation (Note 3) FA4001CM Silicone Acrylate manufactured by Dow Corning Toray Co., Ltd. (Note 4) DC9040 manufactured by Dow Corning Corporation

Preparation Method

-   1. Components 1 to 4 are mixed at 80 to 90° C. to completely     dissolve the mixture, followed by cooling to 50° C. -   2. Components 5 to 12 are mixed. -   3. Phase A obtained in step 1 and Phase B obtained in step 2 are     mixed. -   4. Components 13 and 14 are added to the mixture obtained in step 3     over 30 seconds, and the mixture is stirred. -   5. After the addition, the mixture is stirred for 3 minutes, for 3     minutes and for 4, minutes.

Composition Example 4

Sunscreen (W/O) double-layer of shaking type (Components) (part(s))  (1) Octyl methoxycinnamate 8  (2) Hexyl diethylaminohydroxybenzoylbenzoate 2  (3) Slurry prepared in Synthesis Example 2 1  (4) Slurry of zinc oxide treated with 32 Synthesis Example 6  (5) Cyclopentasiloxane 20.2  (6) Cyclopentasiloxane, 3 dimethicone crosspolymer (Note 1)  (7) Trimethylsiloxysilicic acid (Note 2) 3.3  (8) Preservatives 0.9  (9) Ethanol 5 (10) 1,3-butylene glycol 3 (11) Water 21.6 (Note 1) DC9045 manufactured by Dow Corning Corporation (Note 2) BY11-018 manufactured by Dow Corning Toray Co., Ltd.

Preparation Method

-   1. Components 1 to 9 are mixed. -   2. Components 10 and 11 are mixed. -   3. The mixture obtained in step 2 is added to the mixture obtained     in step 1 to emulsify them.

Composition Example 5

Sunscreen (W/O) cream (Components) (part(s)) Phase A  (1) Octyl methoxycinnamate 6.0  (2) Hexyl diethylaminohydroxybenzoylbenzoate 1.5  (3) Cyclopentasiloxane 5  (4) Cyclopentasiloxane/(acrylates/ 3 polytrimethylsiloxymethacrylate copolymer) (Note 1)  (5) Dimethicone (6 cs) 1  (6) Trioctanoin 1  (7) Cyclopentasiloxane, 3 dimethicone crosspolymer (Note 2)  (8) Polysilicone 13 (Note 3) 2  (9) Zinc oxide, cyclopentasiloxane 10 (slurry concentration = 50%) (10) Slurry of titanium oxide 2 produced in Example 2 Phase B (11) Sodium chloride 1 (12) Panthenol 0.5 (13) Purified water 61.95 (14) Glycerol 2 (15) Preservatives 0.05 (Note 1) FA4001CM Silicone Acrylate manufactured by Dow Corning Toray Co., Ltd. (Note 2) DC9040 manufactured by Dow Corning Corporation (Note 3) FZ-2233 manufactured by Dow Corning Toray Co., Ltd.

Preparation Method

-   1. Components 1 to 10 are stirred by means of a disper. -   2. Components 11 to 15 are mixed. -   3. The mixture obtained in step 2 is added to the mixture obtained     in step 1, and the mixture is emulsified.

Composition Example 6

Lipstick (Components) (part(s))  (1) Ceresin wax 10  (2) Paraffin wax 8  (3) Candelilla wax 2  (4) Squalane 21.8  (5) Liquid lanolin 10  (6) Isodecyl isononanoate 13  (7) Isodecyl neopentanoate 12  (8) Glyceryl tri(caprylate/caprate) 5  (9) Polyether-modified silicone (Note 1) 9 (10) Titanium oxide treated with 2 Synthesis Example 8 (5%) (11) Red No. 201 treated with 2 Synthesis Example 8 (2%) (12) Red No. 202 treated with 1 Synthesis Example 8 (2%) (13) Aluminum lake 3 (14) Antioxidant 0.1 (15) Perfume 0.1 (Note 1) SH3775M manufactured by Dow Corning Toray Co., Ltd.

Preparation Method

All components are heated and mixed, and then poured into a mold. Subsequently, the mixture is cooled.

Composition Example 7

Liquid foundation (O/W) (Components) (part(s)) Phase A  (1) Stearic acid 3  (2) Glyceryl stearate/PEG-100 stearyl 2  (3) Cetyl octanoate 3  (4) Squalane 3.4  (5) Dimethicone (6 cs) 2.3  (6) Trimethylsiloxysilicic acid (Note 1) 6.7 Phase B  (7) 1,3-butylene glycol 8  (8) Titanium oxide treated with 9.5 Synthesis Example 1  (9) Red iron oxide treated with 0.35 Synthesis Example 1 (10) Black iron oxide treated with 0.1 Synthesis Example 1 (11) Yellow iron oxide treated with 1.5 Synthesis Example 1 (12) Talc 1 (13) Preservatives 0.3 Phase C (14) Purified water 57.95 Phase D (15) Triethanolamine 0.9 (Note 1) BY11-018 manufactured by Dow Corning Toray Co., Ltd.

Preparation Method

-   1. Components 7 to 13 are mixed. -   2. Components 1 to 6 are mixed at 80 to 90° C. to completely     dissolve the mixture, followed by cooling to 50° C. -   3. Component 14 is heated to 85° C. -   4. Phase B obtained in step 1 is added to Phase A obtained in step 2     over 30 seconds, and the mixture is stirred at 3,000 rpm. -   5. The revolutions per minute are decreased to 1,000 rpm, and Phase     C obtained in step 3 is added thereto. -   6. The mixture is stirred for 5 minutes. -   7. Component 15 is added to adjust to a pH of 6 to 6.5.

Composition Example 8

Powder foundation (Components) (part(s))  (1) Dimethicone/vinyldimethicone 1 crosspolymer/lauroyl lysine (Note 1)  (2) Titanium oxide treated with an alkylsilane 9  (3) Zinc oxide fine particles treated with 5 an alkylsilane  (4) Titanium oxide fine particles treated with 5 an alkylsilane  (5) Red iron oxide 0.2  (6) Yellow iron oxide 1.4  (7) Black iron oxide 0.3  (8) Platy barium sulfate 7.5 (average particle size = 30 μm)  (9) Paraben 0.2 (10) Talc remainder (11) Sericite treated with Synthesis Example 2 3 (12) Nylon powder 7.5 (13) Phenylmethylsilicone 5 (14) C₃₀₋₄₅ alkyldimethylsilyl 2 Polypropylsilsesquioxane (Note 2) (15) Ethylhexyl methoxycinnamate 1 (16) Diisostearyl malate 3 (17) Dimethylpolysiloxane (350 cSt) 2 (18) Glycerol 0.2 (19) Perfume q.s. (Note 1) EP-9289LL manufactured by Dow Corning Toray Co., Ltd. (Note 2) SW-8005 C30 Resin Wax manufactured by Dow Corning Corporation

Preparation Method

-   1. Components 11 to 19 are mixed and dissolved. -   2. Components 1 to 10 are mixed. -   3. The mixture obtained in step 2 is added to the mixture obtained     in step 1, and the mixture is mixed and kneaded, followed by     pulverizing. -   4. The mixture obtained in step 3 is press-molded in a metal mold,     and thereby, a solid powder foundation is obtained.

Composition Example 9

Lipstick (Components) (part(s)) Phase A  (1) Alkyl-modified silicone (Note 1) 2  (2) Microcrystalline wax 1  (3) Red iron oxide 1 (69% in DC 5562 Carbinol Fluid)  (4) Red No. 7 (42% in DC 5562 Carbinol Fluid) 10  (5) Yellow iron oxide 1 (55% in DC 5562 Carbinol Fluid)  (6) Malic acid diester 1  (7) Lauryl PEG/PPG-18/18 dimethicone (Note 2) 4.2 Phase B  (8) Organic bentonite (Benton 38) 2 Phase C  (9) Dimethicone (2 cs) 18.5 (10) Cyclopentasiloxane/(acrylates/ 20 polytrimethylsiloxymethacrylate copolymer) (Note 3) (11) Trimethylsiloxysilicic acid (Note 4) 3 (12) Dimethicone with high degree 2 of polymerization (Note 5) (13) Silylated silica 1 (14) Mica treated with Synthesis Example 3 9 Phase D (15) Carbomer (2% aqueous solution) 20 (16) Preservatives q.s. (17) Purified water 4.8 Phase G (18) Perfume q.s. (Note 1) AMS-C30 COSMETIC WAX manufactured by Dow Corning Corporation (Note 2) DC5200 Formulation Aid manufactured by Dow Corning Corporation (Note 3) FA4001CM Silicone Acrylate manufactured by Dow Corning Toray Co., Ltd. (Note 4) BY11-018 manufactured by Dow Corning Toray Co., Ltd. (Note 5) BY11-040 manufactured by Dow Corning Toray Co., Ltd.

Preparation Method

-   1. Components 1 to 7 are mixed at 80° C. -   2. Component 8 is added to the mixture obtained in step 1, and then     mixed. -   3. Components 9 to 14 are mixed at 70° C. -   4. The mixture obtained in step 2 and the mixture obtained in step 3     are mixed. -   5. Components 15 to 17 are mixed and then added to the mixture     obtained in step 4 to emulsify them. -   6. Component 18 is added thereto.

Composition Example 10

Transparent lip gloss (Components) (part(s)) (1) Polyamide-modified silicone (2-8178) 16.5 (2) Decamethylpentacyclosiloxane 33 (3) Isododecane/(acrylates/ 3 polytrimethylsiloxymethacrylate copolymer) (4) Isopropyl myristate 20 (5) Glyceryl tricaprylate/glyceryl tricaprate 21.8 (6) Trimethylpentaphenyltrisiloxane 5.5 (7) Titanium oxide treated with 0.2 Synthesis Example 4

Preparation Method

-   1. All components are mixed at 100° C. -   2. The mixture is poured into a metal mold. -   3. The mixture in the mold is allowed to stand for 1 hour.

Composition Example 11

Mascara (Components) (part(s)) Phase A  (1) Candelilla wax 10  (2) Microcrystalline wax 7  (3) Carnauba wax 3  (4) Stearic acid 5  (5) Glyceryl stearate 5 Phase B  (6) Water 35.5  (7) Polypropylene glycol 5  (8) Triethanolamine 1.5 Phase C  (9) Black iron oxide treated with 10 Synthesis Example 5 (10) Polypropylsilsesquioxane (Note 1) 10 (11) Isododecane 8 (Note 1) DC670 Fluid manufactured by Dow Corning Corporation

Preparation Method

-   1. Components 1 to 5 are heated to 85° C. and mixed. -   2. Components 9 to 11 are heated and mixed. -   3. The mixture obtained in step 1 and the mixture obtained in step 2     are mixed. -   4. Components 6 to 8 are mixed and heated to 80° C. -   5. While the mixture obtained in step 3 is stirred at 1,000 rpm, the     mixture obtained in step 1 is added thereto over 30 seconds. -   6. Component 9 is added to the mixture obtained in step 3, stirred     for 2 minutes and cooled.

Composition Example 12

Eye shadow (Components) (part(s)) Phase A  (1) Talc 39.4  (2) Zinc stearate 5  (3) Mica treated with Synthesis Example 6 10  (4) Iron oxide 30  (5) Black iron oxide 0.5  (6) Red iron oxide 1  (7) Yellow iron oxide 2  (8) Dimethicone/vinyldimethicone crosspolymer 3  (9) Polyamide-modified silicone (Note 1) 1 Phase B (10) Glyceryl tricaprylate/glyceryl tricaprate 4 (11) Bishydroxyethoxypropyldimethicone (Note 2) 4 (12) Preservatives q.s. (Note 1) DC2-8178 manufactured by Dow Corning Corporation (Note 2) DC-5562 manufactured by Dow Corning Corporation

Preparation Method

-   1. Components 1 to 9 are mixed until a uniform color is obtained. -   2. Components 10 to 12 are mixed. -   3. Phase B obtained in step 2 is added to Phase A obtained in step 1     while stirring. 

The invention claimed is:
 1. A cosmetic comprising: a powder surface-treated with a surface-treatment agent comprising a copolymer, the copolymer comprising: a carbosiloxane dendrimer structure of the following formula (1):

wherein Z is a divalent organic group; p is 1; each of R¹ and R² independently is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or an aralkyl group having 7 to 10 carbon atoms; and L¹ is a silylalkyl group, in the case of i=1, as set forth by the following formula (2):

wherein Z and p are the same as defined above; R¹ and R² are the same as defined above; i is an integer ranging from 1 to 10, which specifies the number of generations of the silylalkyl group; L^(i+1) is a group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, an aralkyl group having 7 to 10 carbon atoms, and the silylalkyl group, with the proviso that in the case of i=c, in which c is an integer ranging from 1 to 10 and specifies the maximum generation of the silylalkyl group, L^(i+1) is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or an aralkyl group having 7 to 10 carbon atoms; and in the case of i<c, L^(i+1) is the silylalkyl group; and a^(i) is an integer ranging from 0 to 2; and an unsaturated monomer having at least one silicon-bonded alkoxy group; wherein the carbosiloxane dendrimer structure of formula (1) is the carbosiloxane dendrimer structure of formula (2) when the dendrimer structure has one generation; and at least one oil agent.
 2. The cosmetic according to claim 1, wherein the copolymer is obtained by copolymerizing (A) an unsaturated monomer having the carbosiloxane dendrimer structure of formula (1) and a group selected from the group consisting of: (i) an acryl or methacryl group-containing organic group of the following general formula:

wherein R⁴ is a hydrogen atom or a methyl group; and R⁵ is an alkylene group having 1 to 10 carbon atoms, (ii) an acryl or methacryl group-containing organic group of the following general formula:

wherein R⁴ and R⁵ are the same as defined above, (iii) an alkenylaryl group-containing organic group of the following general formula:

wherein R⁶ is a hydrogen atom or a methyl group; R⁷ is an alkyl group having 1 to 10 carbon atoms; R⁸ is an alkylene group having 1 to 10 carbon atoms; b is an integer ranging from 0 to 4; and c is 0 or 1, and (iv) an alkenyl group having 2 to 10 carbon atoms; and (B) an unsaturated monomer having at least one silicon-bonded alkoxy group.
 3. The cosmetic according to claim 1, wherein the copolymer is obtained by further copolymerizing (C) at least one unsaturated monomer having no silicon-bonded alkoxy group.
 4. The cosmetic according to claim 3, wherein (C) the at least one unsaturated monomer having no silicon-bonded alkoxy group has a C₁₋₆ alkyl group.
 5. The cosmetic according to claim 3, wherein the copolymer is obtained by copolymerizing (A) an unsaturated monomer having the carbosiloxane dendrimer structure of formula (1), (B) an unsaturated monomer having at least one silicon-bonded alkoxy group, and (C) at least one of an unsaturated monomer having no silicon-bonded alkoxy group, in a weight ratio satisfying conditions of {(weight of component (A))/(weight of all the monomers)}:{(weight of component (B))/(weight of all the monomers)}:{(weight of component (C))/(weight of all the monomers)} in the range of (0.02 to 0.7):(0.05 to 0.45):(0.01 to 0.75).
 6. The cosmetic according to claim 3, wherein the copolymer is obtained by copolymerizing (A) an unsaturated monomer having the carbosiloxane dendrimer structure of formula (1), (B) an unsaturated monomer having at least one silicon-bonded alkoxy group, and (C) at least one of an unsaturated monomer having no silicon-bonded alkoxy group, in a weight ratio satisfying conditions of {(weight of component (A))/(weight of all the monomers)}:{(weight of component (B))/(weight of all the monomers)}:{(weight of component (C))/(weight of all the monomers)} in the range of (0.02 to 0.7):(0.05 to 0.45):(0.01 to 0.75), and {(weight of component (A))/(weight of all the monomers)}>{(weight of component (B))/(weight of all the monomers)}.
 7. The cosmetic according to claim 1, wherein the oil agent is a silicone oil.
 8. The cosmetic according to claim 7, wherein the silicone oil is a hydrophobic silicone oil having a viscosity at 25° C. ranging from 0.65 to 100,000 mm²/s.
 9. The cosmetic according to claim 7, wherein the silicone oil is an organopolysiloxane of the following general formula (3) or (4):

wherein R⁹ is a hydrogen atom, a hydroxyl group or a group selected from monovalent non-substituted or fluorine- or amino-substituted C₁₋₃₀ alkyl groups, aryl groups, alkoxy groups and groups represented by (CH₃)₃SiO{(CH₃)₂SiO}₁Si(CH₃)₂CH₂CH₂—, wherein 1 is an integer ranging from 0 to 1,000; a′ is an integer ranging from 0 to 3; b′ is an integer ranging from 0 to 1,000; and c′ is an integer ranging from 0 to 1,000, with the proviso that 1≦b′+c′≦2,000,

wherein R⁹ is the same as defined above; d is an integer ranging from 0 to 8; and e is an integer ranging from 0 to 8, with the proviso that 3≦d+e≦8.
 10. The cosmetic according to claim 1, further comprising at least one surfactant selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants and semi-polar surfactants.
 11. The cosmetic according to claim 1, further comprising at least one powder and/or at least one coloring agent.
 12. The cosmetic according to claim 11, wherein the at least one powder has an average particle size ranging from 1 nm to 20 μm, and is selected from the group consisting of inorganic pigment powders, organic pigment powders and resin powders.
 13. The cosmetic according to claim 1, further comprising at least one selected from the group consisting of water-soluble polymers, oil-soluble gelling agents and organo-modified clay minerals.
 14. The cosmetic according to claim 1, further comprising at least one selected from the group consisting of silicone resins, silicone elastomers and organo-modified silicones.
 15. The cosmetic according to claim 1, further comprising at least one UV-ray protective component.
 16. A skin care product, a hair product, an antiperspirant product, a deodorant product, a makeup product or a UV-ray protective product comprising the cosmetic as recited in claim
 1. 17. The cosmetic according to claim 1, wherein the carbosiloxane dendrimer structure is represented by the following formula:

wherein Z and R² are the same as defined above, or the following formula:

wherein Z and R² are the same as defined above.
 18. The cosmetic according to claim 1, wherein the carbosiloxane dendrimer structure is represented by the following formula (2-2):

wherein Z, R¹ and R² are the same as defined above; and a¹ and a² indicate an integer ranging from 0 to
 2. 19. The cosmetic according to claim 1, wherein the carbosiloxane dendrimer structure is represented by the following formula (2-3):

wherein Z, R¹ and R² are the same as defined above; and a¹, a², and a³ indicate an integer ranging from 0 to
 2. 